EP0226693A1 - Packaging machine for forming, filling and sealing of bags - Google Patents

Packaging machine for forming, filling and sealing of bags Download PDF

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Publication number
EP0226693A1
EP0226693A1 EP86105780A EP86105780A EP0226693A1 EP 0226693 A1 EP0226693 A1 EP 0226693A1 EP 86105780 A EP86105780 A EP 86105780A EP 86105780 A EP86105780 A EP 86105780A EP 0226693 A1 EP0226693 A1 EP 0226693A1
Authority
EP
European Patent Office
Prior art keywords
sealing
packaging machine
machine according
sealing jaw
transverse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86105780A
Other languages
German (de)
French (fr)
Other versions
EP0226693B1 (en
Inventor
Roman Dr. Ing. Kammler
Reiner Dr. Ade
Walter Dr. Baur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rovema Verpackungsmaschinen GmbH and Co KG
Rovema GmbH
Original Assignee
Rovema Verpackungsmaschinen GmbH and Co KG
Rovema GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
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Application filed by Rovema Verpackungsmaschinen GmbH and Co KG, Rovema GmbH filed Critical Rovema Verpackungsmaschinen GmbH and Co KG
Priority to BR8606331A priority Critical patent/BR8606331A/en
Publication of EP0226693A1 publication Critical patent/EP0226693A1/en
Application granted granted Critical
Publication of EP0226693B1 publication Critical patent/EP0226693B1/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/2014Tube advancing means
    • B65B9/2028Rollers or belts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/349Cooling the welding zone on the welding spot
    • B29C66/3494Cooling the welding zone on the welding spot while keeping the welding zone under pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/431Joining the articles to themselves
    • B29C66/4312Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/432Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/816General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • B29C66/81811General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws
    • B29C66/81812General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects of the welding jaws the welding jaws being cooled from the outside, e.g. by blowing a gas or spraying a liquid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822Transmission mechanisms
    • B29C66/8222Pinion or rack mechanisms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822Transmission mechanisms
    • B29C66/8224Chain or sprocket drives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822Transmission mechanisms
    • B29C66/8226Cam mechanisms; Wedges; Eccentric mechanisms
    • B29C66/82263Follower pin or roller cooperating with a groove
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83541Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement
    • B29C66/83543Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws flying jaws, e.g. jaws mounted on crank mechanisms or following a hand over hand movement cooperating flying jaws
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/84Specific machine types or machines suitable for specific applications
    • B29C66/849Packaging machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10Applying or generating heat or pressure or combinations thereof
    • B65B51/26Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/306Counter-rotating devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/207Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles the web advancing continuously
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/49Internally supporting the, e.g. tubular, article during joining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822Transmission mechanisms
    • B29C66/8223Worm or spindle mechanisms

Definitions

  • the invention relates to a packaging machine for producing bags from a wrapping material made of heat-sealable material and for filling and closing the pouch, with a preferably vertically extending filling tube, which is surrounded by a shaped shoulder on which the wrapping material can be formed into a tube, one Longitudinal sealing element for connecting the overlapping edges of the wrapping material web and a transverse sealing station which is arranged behind the outlet end of the filling tube and has transverse sealing jaws which are arranged on two sealing jaw carriers which can be rotated synchronously and in opposite directions about parallel axes, each transverse sealing jaw being supported by a jaw holder which can be pivoted relative to the associated sealing jaw carrier is held.
  • Packaging machines of this type have the advantage that the transverse seal, with which one filled bag is closed and the bottom seam is produced for the next bag, takes place during the pull-off movement of the film tube, so that the time required for the pull-off can be used for the sealing. In this way, the production time per bag can be reduced in comparison with those packaging machines in which the transverse sealing takes place when the film tube is at a standstill.
  • the film tube is fed through the welding jaws, the withdrawal movement being not continuous, since after the transverse sealing jaws have been released from the tube, the transverse sealing seams have been produced and the subsequent transverse sealing jaws have been attacked a certain amount of time passes.
  • the star-shaped sealing jaw carriers are mounted on pivotable arms. By pivoting these arms, the cross sealing jaws are approximated to the film tube and clamp it firmly.
  • the sealing jaw carrier is turned further, the enveloping tube is pulled off. With this downward movement it is necessary that the two axes of the sealing jaw carriers are displaced relative to one another.
  • the sealing jaw carriers, together with the sealing jaws arranged on them necessarily have high weights, so that considerable inertia forces arise, which limits the working speed.
  • the intermittent removal of the enveloping tube also affects the working speed.
  • a packaging machine for packaging individual pieces is also known, in which the film tube is moved horizontally (DE-PS 27 01 443).
  • welding and cutting jaws are moved on circular paths.
  • the jaws are only moved parallel to themselves on the circular paths, so that their welding surfaces are always turned towards the film tube. This is achieved with the help of slides that can be moved at right angles to one another, one of which interacts with an eccentric.
  • the parallel movement of the jaws it is achieved that the application of the jaws to the film tube proceeds advantageously, but only a relatively short welding time can be achieved with a given speed of movement of the film tube.
  • the invention has for its object to provide a packaging machine of the type mentioned, as is known from DE-AS 21 26 498 and US-PS 3 522 689, so that a continuous further movement of the wrapping material is possible and the bag lengths as desired can be chosen. Furthermore, the invention is intended to propose a method by means of which a particularly high work output can be achieved with the machine according to the invention.
  • the first part of the object of the invention is achieved in that continuously rotating wrapper conveyors in the form of take-off rolls or take-off belts are provided for pulling off the wrapping material belt, which rest in the area below the shaped shoulder with frictional engagement with the wrapping material and in that the ratio between the peripheral speed of the wrapping material conveyor and the sealing jaw carrier is adjustable is, the speed of movement of the sealing jaws during their contact with the film tube is approximately equal to or less than the peripheral speed of the envelope conveyor.
  • the peripheral speed of the sealing jaw carriers is then selected to be relatively small in a phase between two transverse seals.
  • the peripheral speed of the sealing jaw carrier between two cross seals is chosen to be relatively large. In this way, excessive bulging of the hose end can be avoided. A slight bulge, however, is advantageous for filling the bag.
  • a preferred embodiment of the invention is characterized in that the axes mentioned are arranged in a stationary manner, that the sealing jaw holders are radially displaceable in the sealing jaw carriers and that each sealing jaw holder has two guide elements, each of which is guided on a guideway of a pair of guideways, the guideways are closed in themselves and both guideways have the same shape, but are displaced parallel to one another, and the transverse sealing jaws at least in the area of the sealing zone in which the transverse sealing jaws are straight in the withdrawal direction of the enveloping tube run, are oriented at right angles to the envelope tube.
  • a third guideway is preferably provided which is concentric with one of the guideways mentioned, one of the guideways concentric with one another being arranged on each side of the sealing jaw holder (claim 3). This results in a high rigidity of the arrangement even if the sealing jaws are made relatively long.
  • Each sealing jaw carrier advantageously has a shaft and two guide parts according to claim 4. This allows the jaw holders to be hung up particularly advantageously. It is also expedient to separate the guides for the radial movement of the jaw holders and for their rotation according to claim 5. Large sliding surfaces can be produced for the radial guide.
  • the jaw holders can be guided particularly favorably if a guideway is arranged on one side and a guideway on the other side of the sealing jaw carrier (claim 7). If three guideways are provided according to claim 3, it is particularly advantageous to arrange these concentric guideways so that they cooperate with guide rollers, both of which are concentric with the pivot axis of the jaw holder. This keeps the jaw holder particularly cheap.
  • the shape of the guideways can be calculated particularly easily if a guide element is concentric with the pivot axis of the associated jaw holder.
  • the shape of the guideways can then e.g. advantageously be chosen according to claim 11.
  • a single sealing jaw is sufficient for each sealing jaw carrier.
  • the arrangement of two transverse sealing jaws on a sealing jaw carrier is particularly advantageous. More than two transverse sealing jaws can also be provided on a sealing jaw carrier.
  • the sealing jaw supports are resiliently mounted relative to one another (claim 12).
  • the resilient flexibility can be solved constructively advantageously with the means of claim 13. Due to the resilient flexibility, a defined pressure of the cross sealing jaws against one another can be set, whereby a good adaptation to the respective properties of the enveloping material is possible.
  • a return spring according to claim 14 is advantageously arranged for returning the knife.
  • air nozzles for cooling air for cooling the sealing seam are provided on each cross sealing jaw according to a further embodiment of the invention (claim 16). This allows rapid cooling of the seam and thus rapid hardening of the seam.
  • the air supply to the nozzles is advantageously carried out with the means of claim 17.
  • the means specified in claim 18 can be provided, with which the air throughput can also be determined in addition to a uniform air distribution.
  • the second part of the object of the invention is achieved in accordance with claim 22 in that the web of covering material is drawn off at a speed which is only slightly less than the speed of movement (good speed speed) of the goods to be packed relative to the lower end of the filling tube.
  • the highest possible performance of the machine is achieved by approximating the take-off speed for the wrapping material to the falling speed of the goods to be packaged.
  • the goods to be packaged are spared as much as possible since they avoid hitting the bottom of the bag.
  • This also has the advantage that the bottom seam of the bag to be filled is not stressed, so that filling is also possible before the bag seam has hardened by cooling. This contributes significantly to the achievement of a high working speed.
  • the method according to the invention can also be imagined in such a way that packaging portions are enclosed in bags during their fall. If the ideal state is approximated as closely as possible, the bag is no longer loaded at all during filling.
  • the packaging machine has a frame 1 to which all functional parts of the machine are attached.
  • a metering device 2 which delivers portions to be packaged, is attached to an upper projection 1a.
  • the portions are dispensed into a filling tube 3 and fall into bags to be molded from a tube 4.
  • the tube 4 is formed from a tape 5. Bags are separated in a cross-sealing station, denoted overall by 6.
  • the wrapping material tape 5 is stored on a tape roll 7 and becomes a shape via various deflecting rollers 8, 9, 10 11 led.
  • the band 5 is formed into a tube on which the edges of the band overlap.
  • a longitudinal sealing jaw 12 is used to weld the overlapping edges, which preferably rests permanently against the enveloping material, thus forming a type of grinder.
  • the trigger belt 13 is driven by means of a shaft symbolized by a dash-dotted line 14.
  • the structure of the packaging machine described so far is known.
  • the transverse sealing station 6 is new and is described below.
  • bearing plates 15, on which bearing plates 16, 17 are held are held (see also FIG. 2).
  • Another bearing plate 16a, 17a, which can be seen in FIG. 1, is located parallel to each bearing plate 16, 17.
  • Fig. 3 the pair of bearing plates 17, 17a can be seen.
  • the bearing plates 16, 16a form another pair.
  • the bearing plates 16, 16a are screwed rigidly to their associated holding plate 15.
  • bolts 18 which are stepped down several times and which are screwed into the bearing plate 15 with a front threaded part 18a and press the bearing plate 16 against the bearing plate with a shoulder 18b.
  • Each bolt 18 has a guide area 18c on which the bearing plate 17 (or 17a) can be moved.
  • Both bolts 18 are connected to one another via a bridge 19, which are fixed to the bolt 18 by means of nuts 20, 21.
  • each bolt 18 is surrounded by a helical compression spring 22 which tries to press the bearing plate 17 in the direction of the bearing plate 16.
  • the path of movement is limited by a tension bolt 23 on which an adjusting nut 24 and a lock nut 25 can be screwed. Both the pressure of the springs 22 and the stop position can be changed by the adjustment possibilities.
  • the cross sealing station has two sealing jaw carriers, identified overall by 26 and 27.
  • the sealing jaw carriers 26, 27 are of identical design and are described using the example of the sealing jaw carrier 26 also shown in FIG. 3.
  • the sealing jaw carrier 26 has a shaft 28 which is rotatably mounted in bearings 29, 30.
  • the bearings 29, 30 are held in the bearing plates 17, 17a.
  • drivers 31, 32 are rotatably connected.
  • Each driver 31, 32 has arms diametrically opposite one another. There is a guide slot 33 on each arm.
  • Sliders 34 are displaceable in the guide slots 33 such that their distance from the shaft 28 can change.
  • each slide 34 there is a roller bearing 35 (see FIG. 5) in which a sealing jaw holder 36 is rotatably mounted.
  • the sealing jaw holder 36 has two guide rollers 37 and 38 (see FIG. 3).
  • the guide roller 37 is concentric with the adjacent bearing within the slide 34a and thus also concentric with the pivot axis 98 of the sealing jaw holder 36.
  • the other guide roller 38 is seated on a crank arm 39 which is rigidly connected to the sealing jaw holder 36.
  • the axis of the guide roller 38 is at a distance from the axis of the guide roller 37, which, as said, with the pivot axis of the sealing jaw holder 36 coincides. This distance is defined by the coordinates a, b (see also FIG. 7).
  • a further guide roller 37a is located on the sealing jaw holder 36, which is coaxial with the guide roller 37 and thus also concentric with the adjacent bearing within the slide 34.
  • a curve plate 40 is fixedly connected to the bearing plate 17 and a further curve plate 41 is firmly connected to the bearing plate 17a.
  • a guide groove 42 in which the guide roller 37 engages appropriately.
  • the guide grooves 42, 43 are self-contained and have the same shape as shown in FIG. 7.
  • the guide groove 43 which lies behind the plane of the drawing, is displaced parallel to the guide groove 42 in the vertical direction, namely by a distance which is equal to the distance between the axes of the guide rollers 37 and 38 (see also FIG. 3).
  • the parallel shift is defined by the coordinates a, b already mentioned. The center distance between the guide rollers 37, 37a and 38 is thus
  • a further guide groove 42a is provided concentrically to the guide groove 42, which is located in a further cam plate 40a and into which the guide rollers 37a engage.
  • the guide grooves 42, 42a have the same function for controlling the rotational position of the sealing jaw holder 36.
  • z. B. the guide groove 42a may be omitted.
  • their presence significantly improves the stability of the movement mechanism and is particularly useful when the sealing jaws are of great length.
  • the dash-dotted line 44 is the transverse center of the packaging machine. Further curve plates, of which one curve plate 45 is shown in FIG. 7, are arranged mirror-symmetrically to the plane defined by the dash-dotted line 44. In the same plane as the curve plate 40 is a curve plate, not shown in the drawing, which would lie in front of the drawing plane in FIG.
  • the shape of the guide grooves 42, 42a, 43 is as follows.
  • Fig. 3 shows that the grooves have a rectangular cross section.
  • the section A-B (see FIG. 7) is in the form of a circular arc, the central radius R of the circular arc having its center on the axis of the shaft 28.
  • the sections B-C and D-A are curved transition sections, which can both be of the same design and can deviate from an arc.
  • the section C-D is straight. In this section, the guide rollers move during the sealing and cutting process.
  • the sealing jaw carriers 26 and 27 are driven in opposite directions in the direction of the arrows 46, 47 (see FIG. 1).
  • the shaft 28 (see FIG. 3) is driven via a drive chain 48 which engages in a chain wheel 49 which is connected to the shaft 28 in a rotationally fixed manner.
  • a gear 50 is also connected in a rotationally fixed manner to the shaft 28, which is symbolized in FIG. 2 by a chain-dotted line. This gear 50 meshes with a gear 51 of the same size, which is non-rotatably connected to the shaft of the other sealing jaw carrier.
  • sealing jaw holder The formation of the sealing jaw holder, the sealing jaws attached to it and the formation of cooling strips which are connected to the sealing jaws are described below with reference to FIGS. 4 to 6.
  • Each sealing jaw holder 36 has trunnions 52 on which they are mounted in the roller bearings 35 already mentioned. Such storage is provided at each end of a sealing jaw holder 36. At the end of the bearing shown in FIG. 5, the supply of cooling air is also shown.
  • the cooling air is supplied via a cooling air line 53, which is connected to a fixed rotary distributor 54.
  • the rotary distributor sits on the outer ends of the shafts 28, 94 and is prevented from rotating by a bracket 55 which is attached to a bearing plate 15.
  • a bracket 55 which is attached to a bearing plate 15.
  • the bearing 35 is sealed to the outside by means of a shaft seal 57 which is seated in a cover 58 which is screwed to the slide 34 in which the sealing jaw holder 36 is rotatably mounted.
  • the slider 34 there is an annular air chamber 59 which is sealed to the outside by means of shaft seals 60, 61.
  • the air chamber 59 communicates with the cooling air line 56 in the shaft 28 via a transverse bore 62 in the shaft 94, a hose 63 connected to the transverse bore 62 and a bore 64 in the slide 35.
  • the air chamber 59 communicates via at least one bore 65 with a cavity 66 in the sealing jaw carrier 36.
  • An air channel 67 extends from the cavity 66, to which a hose 68 is connected, which leads to a cooling air strip 69.
  • This cooling air strip 69 is shown in section in FIG. 6.
  • the cooling air strip 69 contains a collecting space 70 in the form of a large-volume bore. Said hose 68 is connected to this collecting space via a hose nozzle 71.
  • a distributor bore 72 extends parallel to the collecting space 70, from which a plurality of nozzles 73 extend open on an outer surface 74 of the cooling air strip 69.
  • the distributor bore is closed off from the outside by a screw plug 75.
  • the distributor bore 72 is connected in its end regions to the collecting space 70 via transverse bores 76, 77.
  • the transverse bores 76, 77 extend to an end surface 78 of the cooling air strip and are closed there by means of screws 79, 80.
  • the screws 79, 80 also form adjustable throttle elements.
  • the cooling air strips 69 are placed on the transverse sealing jaws 81 and 82, respectively.
  • the air nozzles 73 are oriented in such a way that they direct air into the area of the sealing seam 83.
  • Cutting knives are located on the transverse sealing jaws 82 of a sealing jaw carrier. In the case shown, the cutting knives are provided on the transverse sealing jaws 82 of the sealing jaw carrier 26.
  • a guide slot 84 in which a knife 85 can be slid.
  • the knife has a cutting edge 85a.
  • a piston-like guide piece 86 is fastened to the back of the knife 85 and can be slid in a bushing 87 which is embedded in the transverse sealing jaw 82.
  • the rod 88 is surrounded by a helical compression spring 89 which is supported at one end on the bottom of a recess 90 which is located in the sealing jaw carrier 36, while the other end is supported on a nut 91 which is screwed onto a thread of the rod 88.
  • the spring 89 is biased. Their pretension can be regulated by screwing the nut 91 more or less far.
  • the rear end 88a of the rod 88 forms a tactile surface which interacts with a control surface 92a, e.g. B. the cylindrical outer surface of a ring 92 which is placed on the shaft 94.
  • the packaging machine works as follows. The simple case is assumed that both the pull-off speed of the enveloping tube 4 and the angular speed of the shafts 28 and 94 are constant. These speeds are related to each other, which corresponds to the desired bag length. If long bags are to be produced, the pull-off speed for the film tube 4 is relatively high. If shorter bags are to be produced, the take-off speed is relatively lower in relation to the angular speed of the shafts 28, 94. The ratio can be changed as desired. For this purpose, there is a transmission-type connection between the drive shafts 14 for the trigger belt and that sprocket 95 from which the two sealing jaw holders 26, 27 are driven in opposite directions via the chain 48.
  • each sealing jaw holder 36 in two guide grooves 42, 43 offset parallel to one another ensures that the sealing jaw holders maintain a horizontal position over their entire circumference.
  • Two transverse sealing jaws 81, 82 approach the film tube obliquely from above and, after passing through the transition areas AD, are in the position shown in FIGS. 1 and 4, in which the transverse sealing jaws 81, 82 press the two layers of enveloping material to be welded against one another and through Seal the effects of heat together.
  • an upper bag 96 which is still to be filled is provided with a bottom seam 96a, while a lower already filled bag 97 is provided with a top seam 97b. Bottom seam 97a was formed in a previous cycle.
  • filling material can be entered.
  • the lower bag 97 is separated by means of the knife 85, which is moved to the left by running onto the control surface 92a.
  • the severing can take place in the initial region of the downward movement of the transverse sealing jaws 81, 82, since the lower pouch 97 cannot fall off even after the severing due to its being clamped by the transverse sealing jaws 81, 92.
  • the cross sealing and cutting station has passed when the guide rollers 37 have reached point C.
  • the cross sealing jaws now diverge, whereby the lower bag 97 is released and falls down.
  • transverse sealing jaws 81, 82 After the transverse sealing jaws 81, 82 have moved away from the seam, the subsequent pouch has already been filled and the diametrically opposite transverse sealing jaws 81a, 82a have largely become attached to the film tube 4 approached. They come into contact with the film tube soon after the cross-sealing jaws 81a, 82a have come loose, after which the cycle described runs again.
  • the second possibility is that by changing the angular speed of the drive shafts 14 of the trigger belt 13, the trigger speed is first slowed down and then increased again.
  • the third possibility is that both the angular speed of the shafts 28, 94 within the cross-sealing zone is changed and the pull-off speed of the film tube 4. Such adjustments can be made using conventional means, with purely mechanical and electronic solutions being available to the person skilled in the art .
  • transition areas AD and CB of the control grooves 42, 43 can be optimized with regard to the lowest possible accelerations, as a result of which the inertial forces are kept low.
  • a gear connection 103 is provided between the drive 101 for the sealing jaw carriers 26, 27 and a drive shaft 102 for the trigger belt 13, which is indicated only symbolically in the drawing by a dash-dotted line.
  • the gear connection 103 allows the speed ratio between the sealing jaw carriers 26, 27 and the shaft 102 to be changed.
  • an electrical shaft can also be provided, e.g. also one with a stepper motor. In addition to these possibilities, any known method can be used to change the speed ratio between two shafts.
  • the drive 101 can be adjusted so that the angular velocity of the sealing jaw carriers becomes non-uniform in order to achieve that the speed of movement of the sealing jaws 81, 82 in the DC region (see FIG. 7) matches the speed of movement of the film tube becomes.

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Abstract

Verpackungsmaschine zum Herstellen, Füllen und Verschlie­ßen von Beuteln.Packaging machine for the manufacture, filling and sealing of bags.

An einer als Schlauchbeutelmaschine ausgebildeten Verpak­kungsmaschine wird ein Folienschlauch (4) kontinuierlich mittels Abzugsriemen (13) abgezogen. Quersiegelnähte wer­den mittels kontinuierlich umlaufender Quersiegelbacken (81, 82, 81a, 82a) hergestellt. Die Quersiegelbacken wer­den durch Führung in Führungsnuten während ihres gesamten Umlaufes in horizontaler Lager gehalten. Die Führungskurven haben im Bereich einer Siegelzone gerade Kurvenstücke, die sich parallel zur Abzugsrichtung des Folienschlauches (4) erstrecken.A film tube (4) is continuously pulled off on a packaging machine designed as a tubular bag machine by means of a take-off belt (13). Cross sealing seams are produced by means of continuously rotating cross sealing jaws (81, 82, 81a, 82a). The cross sealing jaws are held in horizontal bearings by guidance in guide grooves during their entire circulation. The guide curves have straight curve sections in the area of a sealing zone, which extend parallel to the withdrawal direction of the film tube (4).

Die Verpackungsmaschine erlaubt eine hohe Arbeitsgeschwin­digkeit, da die Quersiegelung gleichzeitig mit der Abzugs­bewegung erfolgt und die Quersiegelbacken (81, 82, 81a, 82a) exakt in einer optimalen Lage zum Folienschlauch (4) geführt werden. Die Maschine kann so betrieben werden, daß die Abzugsgeschwindigkeit für den Hüllstoff nur wenig klei­ner ist als die Geschwindigkeit des zu verpackenden Gutes am Ende des Füllrohres.

Figure imgaf001
The packaging machine allows a high working speed because the cross-sealing takes place simultaneously with the pull-off movement and the cross-sealing jaws (81, 82, 81a, 82a) are guided in an optimal position to the film tube (4). The machine can be operated so that the take-off speed for the wrapping material is only slightly less than the speed of the goods to be packaged at the end of the filling tube.
Figure imgaf001

Description

Die Erfindung bezieht sich aus eine Verpackungsmaschine zum Herstellen von Beuteln aus einem Hüllstoffband aus heißver­siegelbarem Material und zum Füllen und Verschließen der Beutel, mit einem vorzugsweise vertikal verlaufenden Füll­rohr, das von einer Formschulter umgeben ist, an der das Hüll­stoffband zu einem Schlauch formbar ist, einem Längssiegelor­gan zur Verbindung der sich überlappenden Ränder der Hüllstoff­bahn und einer Quersiegelstation, die hinter dem Ausgangsen­de des Füllrohres angeordnet ist und Quersiegelbacken auf­weist, die an zwei um parallele Achsen synchron und gegenläu­fig drehbaren Siegelbackenträgern angeordnet sind, wobei je­de Quersiegelbacke von einem relativ zum zugeordneten Siegel­backenträger schwenkbaren Backenhalter gehalten ist.The invention relates to a packaging machine for producing bags from a wrapping material made of heat-sealable material and for filling and closing the pouch, with a preferably vertically extending filling tube, which is surrounded by a shaped shoulder on which the wrapping material can be formed into a tube, one Longitudinal sealing element for connecting the overlapping edges of the wrapping material web and a transverse sealing station which is arranged behind the outlet end of the filling tube and has transverse sealing jaws which are arranged on two sealing jaw carriers which can be rotated synchronously and in opposite directions about parallel axes, each transverse sealing jaw being supported by a jaw holder which can be pivoted relative to the associated sealing jaw carrier is held.

Verpackungsmaschinen dieser Art haben den Vorteil, daß die Quersiegelung, mit der jeweils ein gefüllter Beutel verschlos­sen und für den nächsten Beutel die Bodennaht hergestellt wird, während der Abzugsbewegung des Folienschlauches stattfin­det, so daß die für den Abzug nötige Zeit für das Siegeln genutzt werden kann. Damit läßt sich die Herstellungszeit pro Beutel im Vergleich mit solchen Verpackungsmaschinen verringern, bei denen die Quersiegelung bei stillstehen­dem Folienschlauch stattfindet.Packaging machines of this type have the advantage that the transverse seal, with which one filled bag is closed and the bottom seam is produced for the next bag, takes place during the pull-off movement of the film tube, so that the time required for the pull-off can be used for the sealing. In this way, the production time per bag can be reduced in comparison with those packaging machines in which the transverse sealing takes place when the film tube is at a standstill.

Bei einer bekannten Verpackungsmaschine der genannten Art (DE-AS 21 26 498) erfolgt der Vorschub des Folienschlau­ches durch die Schweißbacken, wobei die Abzugsbewegung nicht kontinuierlich ist, da nach dem Lösen derjenigen Quersiegelbacken vom Schlauch, die Quersiegelnähte herge­stellt haben und dem Angreifen der folgenden Quersiegel­backen notwendig eine gewisse Zeit verstreicht. Bei der bekannten Verpackungsmaschine sind die sternförmig ausge­bildeten Siegelbackenträger an schwenkbaren Armen gelagert. Durch Verschwenkung dieserArme werden die Quersiegelbacken an den Folienschlauch angenähert und klemmen diesen fest. Bei weiterer Drehung der Siegelbackenträger wird der Hüll­stoffschlauch abgezogen. Bei dieser Abwärtsbewegung ist es erforderlich, daß die beiden Achsen der Siegelbacken­träger relativ zueinander verschoben werden. Die Siegel­backenträger samt den an ihnen angeordneten Siegelbacken haben notwendig hohe Gewichte, so daß erhebliche Massen­kräfte entstehen, wodurch die Arbeitsgeschwindigkeit be­grenzt wird. Auch der intermittierende Abzug des Hüllstoff­schlauches beeinträchtigt die Arbeitsgeschwindigkeit.In a known packaging machine of the type mentioned (DE-AS 21 26 498), the film tube is fed through the welding jaws, the withdrawal movement being not continuous, since after the transverse sealing jaws have been released from the tube, the transverse sealing seams have been produced and the subsequent transverse sealing jaws have been attacked a certain amount of time passes. In the known packaging machine, the star-shaped sealing jaw carriers are mounted on pivotable arms. By pivoting these arms, the cross sealing jaws are approximated to the film tube and clamp it firmly. When the sealing jaw carrier is turned further, the enveloping tube is pulled off. With this downward movement it is necessary that the two axes of the sealing jaw carriers are displaced relative to one another. The sealing jaw carriers, together with the sealing jaws arranged on them, necessarily have high weights, so that considerable inertia forces arise, which limits the working speed. The intermittent removal of the enveloping tube also affects the working speed.

Bei einer weiteren bekannten Verpackungsmaschine (US-PS 3 522 689), die ähnlich ausgebildet ist, wie die zuvor be­sprochene Maschine nach der DE-AS 21 26 498, sind an je­des Siegelbackenträgers insgesamt sechs Siegelbacken ange­ordnet, so daß ein Siegelbackenpaar am Hüllstoffschlauch angreifen kann, bevor die vorausgegangenen Siegelbacken den Folienschlauch freigegeben haben. Dadurch wird ein kontinuierlicher Abzug der Folie erreicht, jedoch läßt sich die Beutellänge nicht verändern, wenn der kontinu­ierliche Abzug beibehalten werden soll. Würde die Beutel­länge dadurch verdoppelt, daß nur drei der sechs Backen jedes Siegelbackenträgers verwendet werden, so wäre ein kontinuierlicher Abzug nicht mehr möglich.In another known packaging machine (US-PS 3 522 689), which is designed similarly to the previously discussed machine according to DE-AS 21 26 498, a total of six sealing jaws are arranged on each sealing jaw carrier, so that a pair of sealing jaws on the enveloping tube can attack before the previous sealing jaws have released the film tube. This results in a continuous removal of the film, but the length of the bag cannot be changed if the continuous removal is to be maintained. If the length of the bag were doubled by using only three of the six jaws of each sealing jaw carrier, a continuous deduction would no longer be possible.

Bei einer weiteren bekannten Verpackungsmaschine (DE-PS 31 41 431) rotieren Quersiegelbacken um feststehende Ach­sen. Um die gleichen Achsen rotieren auch fest mit Hal­tern für die Quersiegelbacken verbundene Reibsegmente, mit denen der Folienschlauch abgezogen wird. Zwischen den voreilenden Reibsegmenten und den nachfolgenden Quer­siegelbacken befindet sich ein Freiraum für das Einfüllen von Füllgut. Nachteilig an dieser Verpackungsmaschine ist die sehr kurze Schweißzeit. Auch ist die Bewegungscharak­teristik der Quersiegelbacken so, daß diese zunächst nur mit Kanten am Hüllstoffschlauch anliegen. Die kurze Schweiß­zeit begrenzt die Anwendung der bekannten Maschine auf wenige Hüllstoffe bestimmter Beschaffenheit. Infolge der anfänglichen, nur linienförmigen Berührung zwischen Quer­siegelbacken und Hüllstoffschlauch, besteht die Gefahr,daß der Hüllstoff überhitzt wird. Während der Schließbewegung der Quersiegelbacken besteht zwischen den Schweißflächen der beiden Quersiegelbacken ein Keil, in den Füllgut fal­len kann, wodurch die Versiegelung beeinträchtigt wird. Problematisch ist bei dieser bekannten Maschine auch die Anordnung von Messern zum Abschneiden fertiger Beutel. Die Beutelgrößen können nur in engen Grenzen variiert wer­den.In another known packaging machine (DE-PS 31 41 431) cross-sealing jaws rotate about fixed axes. Friction segments, which are firmly connected to holders for the cross-sealing jaws and with which the film tube is pulled off, also rotate about the same axes. There is a free space between the leading friction segments and the subsequent cross sealing jaws for the filling material. The disadvantage of this packaging machine is the very short welding time. The movement characteristics of the cross sealing jaws are such that they initially only rest on the enveloping tube with edges. The short welding time limits the use of the known machine to a few coating materials of a certain nature. As a result of the initial, only linear contact between the cross-sealing jaws and the wrapping material, there is a risk that the wrapping material will overheat. During the closing movement of the cross sealing jaws, there is a wedge between the welding surfaces of the two cross sealing jaws into which the filling material can fall, as a result of which the sealing is impaired. The arrangement of knives for cutting finished bags is also problematic in this known machine. The bag sizes can only be varied within narrow limits.

Bekannt ist schließlich auch eine Verpackungsmaschine für die Verpackung von Einzelstücken, bei der der Folienschlauch horizontal bewegt wird (DE-PS 27 01 443). In einer Schweiß­und Schneidstation werden Schweiß- und Schneidbacken auf kreisförmigen Bahnen bewegt. Auf den Kreisbahnen werden die Backen nur parallel zu sich selber verlagert, so daß ihre Schweißflächen stets dem Folienschlauch zugewendet sind. Dies wird mit Hilfe von rechwinklig zueinander be­wegbaren Schlitten erreicht, von denen einer mit einem Ex­zenter zusammenwirkt. Mit der Parallelbewegung der Backen erreicht man zwar, daß das Anlegen der Backen an den Folien­schlauch vorteilhaft abläuft, jedoch lassen sich bei einer gegebenen Bewegungsgeschwindigkeit des Folienschlauches nur relativ kurze Schweißzeiten verwirklichen.Finally, a packaging machine for packaging individual pieces is also known, in which the film tube is moved horizontally (DE-PS 27 01 443). In a welding and cutting station, welding and cutting jaws are moved on circular paths. The jaws are only moved parallel to themselves on the circular paths, so that their welding surfaces are always turned towards the film tube. This is achieved with the help of slides that can be moved at right angles to one another, one of which interacts with an eccentric. With the parallel movement of the jaws it is achieved that the application of the jaws to the film tube proceeds advantageously, but only a relatively short welding time can be achieved with a given speed of movement of the film tube.

Der Erfindung liegt die Aufgabe zugrunde, eine Verpackungs­maschine der eingangs genannten Art, wie sie aus der DE-­AS 21 26 498 und der US-PS 3 522 689 bekannt ist, so aus­zubilden, daß eine kontinuierliche Weiterbewegung des Hüllstoffes möglich ist und die Beutellängen beliebig ge­wählt werden können. Ferner soll durch die Erfindung ein Verfahren vorgeschlagen werden, durch das mit der erfin­dungsgemäßen Maschine eine besonders hohe Arbeitsleistung erzielbar ist.The invention has for its object to provide a packaging machine of the type mentioned, as is known from DE-AS 21 26 498 and US-PS 3 522 689, so that a continuous further movement of the wrapping material is possible and the bag lengths as desired can be chosen. Furthermore, the invention is intended to propose a method by means of which a particularly high work output can be achieved with the machine according to the invention.

Der erste Teil der Erfindungsaufgabe wird dadurch gelöst, daß zum Abzug des Hüllstoffbandes ständig umlaufende Hüll­stofförderer in Form von Abzugszrollen oder Abzugsbändern vorgesehen sind, die im Bereich unterhalb der Formschulter mit Reibschluß am Hüllstoff anliegen und daß das Verhält­nis zwischen der Umfangsgeschwindigkeit der Hüllstofför­derer und der Siegelbackenträger einstellbar ist, wobei die Bewegungsgeschwindigkeit der Siegelbacken während ih­res Kontaktes mit dem Folienschlauch etwa gleich oder klei­ner ist als die Umfangsgeschwindigkeit der Hüllstofförderer.The first part of the object of the invention is achieved in that continuously rotating wrapper conveyors in the form of take-off rolls or take-off belts are provided for pulling off the wrapping material belt, which rest in the area below the shaped shoulder with frictional engagement with the wrapping material and in that the ratio between the peripheral speed of the wrapping material conveyor and the sealing jaw carrier is adjustable is, the speed of movement of the sealing jaws during their contact with the film tube is approximately equal to or less than the peripheral speed of the envelope conveyor.

Bei einer so ausgebildeten Verpackungsmaschine erfolgt der Abzug nicht, wie bei den bekannten Maschinen mit den Sie­gelbacken (sogenannter Zangenabzug),sondern mittels beson­derer Hüllstofförderer, wie sie bei Schlauchbeutel-Verpak­ kungsmaschinen an sich bekannt sind. Durch die Trennung von Hüllstofftransport und Quersiegelung kann ein kontinuier­licher Hüllstoffabzug auch beibehalten werden, wenn die Beu­tellängen variiert werden, da es nicht, wie bei der bekann­ten Maschine nach der US-PS 3 522 689, erforderlich ist,daß zwei Quersiegelbacken-Paare gleichzeitig mit dem Folien­schlauch in Eingriff stehen. Verschiedene Beutellängen sind auch dann herstellbar, wenn die Siegelbackenträger mit etwa gleichbleibender Winkelgeschwindigkeit rotieren. Bei der Herstellung längerer Beutel findet dann eine Aufbauchung des unteren Endes des Folienschlauches statt. Es ist aber auch möglich und steuerungstechnisch unproblematisch, die Winkel­geschwindigkeit während des Umlaufes der Siegelbackenträger stark zu variieren. Bei der Herstellung relativ langer Beu­teil wird dann die Umfangsgeschwindigkeit der Siegelbacken­träger in einer Phase zwischen zwei quersiegelungen relativ klein gewählt. Bei der Herstellung relativ kurzer Beutel wird Umfangsgeschwindigkeit der Siegelbackenträger zwischen zwei Quersiegelungen relativ groß gewählt. Auf diese Weise kann eine übermäßige Aufbauchung des Schlauchendes vermie­den werden. Eine geringe Aufbauchung jedoch ist für die Fül­lung des Beutels vorteilhaft.With a packaging machine designed in this way, the removal is not carried out, as in the known machines with the sealing jaws (so-called pliers removal), but by means of special envelope conveyors, as is the case with tubular bag packaging machines are known per se. By separating the wrapping material transport and the transverse seal, a continuous draining of the wrapping material can also be maintained if the bag lengths are varied, since it is not necessary, as in the known machine according to US Pat Foil tube are engaged. Different bag lengths can also be produced if the sealing jaw carriers rotate at an approximately constant angular velocity. When producing longer bags, the lower end of the film tube then bulges. However, it is also possible and unproblematic in terms of control technology to vary the angular velocity strongly during the rotation of the sealing jaw carriers. In the production of relatively long parts, the peripheral speed of the sealing jaw carriers is then selected to be relatively small in a phase between two transverse seals. In the production of relatively short bags, the peripheral speed of the sealing jaw carrier between two cross seals is chosen to be relatively large. In this way, excessive bulging of the hose end can be avoided. A slight bulge, however, is advantageous for filling the bag.

Eine bevorzugte Ausführungsform der Erfindung ist dadurch gekennzeichnet, daß die genannten Achsen ortsfest angeord­net sind, daß die Siegelbackenhalter in den Siegelbackenträ­gern radial verschiebbar sind und daß jeder Siegelbacken­halter zwei Führungselemente aufweist, von denen jedes an einer Führungsbahn eines Führungsbahnen-Paares geführt ist, wobei die Führungsbahnen in sich geschlossen sind und bei­de Führungsbahnen die gleiche Form haben, jedoch parallel zueinander verschoben sind und die Quersiegelbacken min­destens im Bereich der Siegelzone, in der die Quersiegel­backen geradlinig in Abzugsrichtung des Hüllstoffschlauches verlaufen, rechtwinklig zum Hüllstoffschlauch orientiert sind.A preferred embodiment of the invention is characterized in that the axes mentioned are arranged in a stationary manner, that the sealing jaw holders are radially displaceable in the sealing jaw carriers and that each sealing jaw holder has two guide elements, each of which is guided on a guideway of a pair of guideways, the guideways are closed in themselves and both guideways have the same shape, but are displaced parallel to one another, and the transverse sealing jaws at least in the area of the sealing zone in which the transverse sealing jaws are straight in the withdrawal direction of the enveloping tube run, are oriented at right angles to the envelope tube.

Bei einer so ausgebildeten Verpackungsmaschine treten auch bei hoher Arbeitsgeschwindigkeit nur verhältnismäßig kleine Massenkräfte auf, da nicht die gesamten Siegelbackenträger diskontinuierlich bewegt werden, sondern lediglich die Bak­kenhalter relativ kleine Bewegungen relativ zu den Siegel­backenträgern ausführen. Durch die besondere Führung der Backenhalter wird gewährleistet, daß die Quersiegelbacken von Anfang an mit ihren gesamten Heizflächen mit dem Hüll­stoff in Berührung kommen. Dadurch werden Verbrennungen des Hüllstoffes sicher vermieden. Die Siegelzeit kann sich an­nähernd über einen vollen Arbeitstakt erstrecken, so daß auch bei hoher Taktzahl eine lange Siegelzeit zur Verfügung steht und so praktisch alle üblichen Hüllstoffe verarbeitet werden können.In a packaging machine designed in this way, only relatively small mass forces occur even at high working speeds, since the entire sealing jaw carriers are not moved discontinuously, but only the jaw holders carry out relatively small movements relative to the sealing jaw carriers. The special guidance of the jaw holder ensures that the cross-sealing jaws come into contact with the entire heating surface from the start. This safely prevents burns of the coating material. The sealing time can extend approximately over a full working cycle, so that a long sealing time is available even with a high number of cycles and practically all conventional enveloping materials can be processed.

Vorzugsweise ist eine dritte Führungsbahn vorgesehen, die zu einer der genannten Führungsbahnen konzentrisch ist, wobei an jeder Seite der Siegelbackenhalter eine der zu­einander konzentrischen Führungsbahnen angeordnet ist (An­spruch 3). Dadurch erhält man eine große Steifigkeit der Anordnung auch dann, wenn die Siegelbacken verhältnis­mäßig lang ausgebildet sind.A third guideway is preferably provided which is concentric with one of the guideways mentioned, one of the guideways concentric with one another being arranged on each side of the sealing jaw holder (claim 3). This results in a high rigidity of the arrangement even if the sealing jaws are made relatively long.

Vorteilhafterweise hat jeder Siegelbackenträger eine Wel­le und zwei Führungsteile gemäß Anspruch 4. Damit lassen sich die Backenhalter besonders vorteilhaft aufhängen. Zweckmäßig ist auch die Trennung der Führungen für die ra­diale Bew-egung der Backenhalter und für deren Drehung ge­mäß Anspruch 5. Damit lassen sich große Gleitflächen für die radiale Führung herstellen.Each sealing jaw carrier advantageously has a shaft and two guide parts according to claim 4. This allows the jaw holders to be hung up particularly advantageously. It is also expedient to separate the guides for the radial movement of the jaw holders and for their rotation according to claim 5. Large sliding surfaces can be produced for the radial guide.

Vorteilhaft ist die Ausbildung der Führungsbahnen als Nu­ten gemäß Anspruch 6, da hierdurch eine Zwangsführung er­ reicht wird. Im Prinzip jedoch ist es auch möglich, die Führungselemente durch Federkräfte an eine Führungsbahn anzudrücken.It is advantageous to design the guideways as grooves according to claim 6, since this results in positive guidance is enough. In principle, however, it is also possible to press the guide elements against a guide track by means of spring forces.

Besonders günstig lassen sich die Backenhalter führen, wenn jeweils eine Führungsbahn auf einer Seite und eine Führungsbahn auf der anderen Seite des Siegelbackenträ­gers angeordnet ist (Anspruch 7). Wenn drei Führungsbah­nen gemäß Anspruch 3 vorgesehen sind, ist es besonders vorteilhaft, diese konzentrischen Führungsbahnen so an­zuordnen, daß sie mit Führungsrollen zusammenwirken, die beide konzentrisch zur Schwenkachse des Backenhalters sind. Dadurch wird der Backenhalter besonders günstig gehalten.The jaw holders can be guided particularly favorably if a guideway is arranged on one side and a guideway on the other side of the sealing jaw carrier (claim 7). If three guideways are provided according to claim 3, it is particularly advantageous to arrange these concentric guideways so that they cooperate with guide rollers, both of which are concentric with the pivot axis of the jaw holder. This keeps the jaw holder particularly cheap.

Die Form der Führungsbahnen läßt sich besonders leicht berechnen, wenn ein Führungselement gemäß Anspruch 8 zur Schwenkachse des zugeordneten Backenhalters konzentrisch ist. Die Form der Führungsbahnen kann dann z.B. vorteil­haft gemäß Anspruch 11 gewählt werden.The shape of the guideways can be calculated particularly easily if a guide element is concentric with the pivot axis of the associated jaw holder. The shape of the guideways can then e.g. advantageously be chosen according to claim 11.

Im Prinzip genügt für jeden Siegelbackenträger eine ein­zige Siegelbacke. Besonders vorteilhaft jedoch ist die Anordnung von zwei Quersiegelbacken an einem Siegelbacken­träger gemäß Anspruch 10. Auch können mehr als zwei Quer­siegelbacken an einem Siegelbackenträger vorgesehen wer­den.In principle, a single sealing jaw is sufficient for each sealing jaw carrier. However, the arrangement of two transverse sealing jaws on a sealing jaw carrier is particularly advantageous. More than two transverse sealing jaws can also be provided on a sealing jaw carrier.

Gemäß einer weiteren Ausgestaltung sind die Siegelbacken­träger relativ zueinander federnd nachgiebig gelagert (Anspruch 12). Die federnde Nachgiebigkeit kann konstruk­tiv vorteilhaft mit den Mitteln des Anspruches 13 gelöst werden. Durch die federnde Nachgiebigkeit kann ein defi­nierter Druck der Quersiegelbacken gegeneinander einge­stellt werden, wodurch eine gute Anpassung an die jewei­lige Beschaffenheit des Hüllstoffes möglich ist.According to a further embodiment, the sealing jaw supports are resiliently mounted relative to one another (claim 12). The resilient flexibility can be solved constructively advantageously with the means of claim 13. Due to the resilient flexibility, a defined pressure of the cross sealing jaws against one another can be set, whereby a good adaptation to the respective properties of the enveloping material is possible.

Wegen der langen Kontaktzeit der Siegelbacken mit dem Hüll­stoff ist auch ohne Probleme die Anordnung eines Messers in den Siegelbacken möglich, wobei die Messerbetätigung vor­teilhafterweise gemäß Anspruch 13 durchgeführt wird. Zum Zurückführen des Messers ist vorteilhafterweise eine Rück­drückfeder gemäß Anspruch 14 angeordnet.Because of the long contact time of the sealing jaws with the enveloping material, the arrangement of a knife in the sealing jaws is also possible without problems, the knife actuation advantageously being carried out according to claim 13. A return spring according to claim 14 is advantageously arranged for returning the knife.

Damit die Arbeitsgeschwindigkeit weiter gesteigert werden kann, sind gemäß einer weiteren Ausgestaltung der Erfin­dung an jeder Quersiegelbacke Luftdüsen für Kühlluft zur Abkühlung der Siegelnaht vorgesehen (Anspruch 16). Damit läßt sich eine rasche Nahtabkühlung und damit rasche Ver­festigung der Naht erreichen. Die Luftzuführung zu den Düsen erfolgt vorteilhafter weise mit den Mitteln des An­spruches 17. Zu einer gleichmäßigen Luftverteilung kön­nen die im Anspruch 18 angegebenen Mittel vorgesehen wer­den, mit denen auch außer einer gleichmäßigen Luftvertei­lung der Luftdurchsatz bestimmt werden kann.So that the working speed can be increased further, air nozzles for cooling air for cooling the sealing seam are provided on each cross sealing jaw according to a further embodiment of the invention (claim 16). This allows rapid cooling of the seam and thus rapid hardening of the seam. The air supply to the nozzles is advantageously carried out with the means of claim 17. For a uniform air distribution, the means specified in claim 18 can be provided, with which the air throughput can also be determined in addition to a uniform air distribution.

Im Prinzip ist es möglich, daß die Drehgeschwindigkeit der Wellen der Siegelbackenträger und die Abzugsgeschwin­digkeit des Folienschlauches konstant sind und in einem bestimmten Verhältnis zueinander stehen. Die verhältnis­mäßig geringen Geschwindigkeitsänderungen, die in diesem Falle die Quersiegelbacken im Bereich der Siegelstation erfahren, können vom Schlauch ohne weiteres aufgefangen werden, zumal dieser durch das Füllgut ausgebeult wird. Man kann aber auch gemäß den Ansprüchen 19 bis 21 Ge­schwindigkeitsanpassungen vornehmen, was inbesondere bei der Herstellung großer Beutel vorteilhaft sein kann.In principle, it is possible that the speed of rotation of the shafts of the sealing jaw carriers and the speed of pulling off the film tube are constant and have a specific relationship to one another. The relatively small changes in speed, which in this case the cross sealing jaws experience in the area of the sealing station, can be easily absorbed by the hose, especially since this is bulged out by the filling material. However, speed adjustments can also be made in accordance with claims 19 to 21, which can be advantageous in particular in the production of large bags.

Der zweite Teil der Erfindungsaufgabe wird gemäß An­spruch 22 dadurch gelöst, daß die Hüllstoffbahn mit ei­ner Geschwindigkeit abgezogen wird, die nur wenig klei­ner ist als die Bewegungsgeschwindigkeit (Gutgeschwindig­ keit) des zu verpackenden Gutes relativ zum unteren Ende des Füllrohres.The second part of the object of the invention is achieved in accordance with claim 22 in that the web of covering material is drawn off at a speed which is only slightly less than the speed of movement (good speed speed) of the goods to be packed relative to the lower end of the filling tube.

Durch die Annäherung der Abzugsgeschwindigkeit für den Hüllstoff an die Fallgeschwindigkeit des zu verpackenden Gutes wird die höchstmögliche Leistung der Maschine er­zielt. Das zu verpackende Gut wird bestmöglich geschont, da ein Aufprallen auf den Boden des Beutels vermieden wird. Dies hat auch den Vorteil, daß die Bodennaht des zu füllenden Beutels nicht belastet wird, so daß ein Fül­len auch möglich ist, bevor die Beutelnaht durch Abküh­lung fest geworden ist. Dies trägt wesentlich zur Erzie­lung einer hohen Arbeitsgeschwindigkeit bei. Man kann sich das erfindungsgemäße Verfahren auch so vorstellen, daß Verpackungsportionen während ihres Falles in Beutel eingeschlossen werden. Bei möglichst weiter Annäherung an diesen Idealzustand findet eine Belastung des Beutels während des Füllens überhaupt nicht mehr statt. Um jedoch genügend sicher zu vermeiden, daß Füllgut in die Quernäh­te eingeschweißt wird, ist es zweckmäßig, einen gewissen Unterschied zwischen Gutgeschwindigkeit und Abzugsgeschwin­digkeit einzuhalten. Zweckmäßige Größen hierfür sind im Anspruch 23 angegeben.The highest possible performance of the machine is achieved by approximating the take-off speed for the wrapping material to the falling speed of the goods to be packaged. The goods to be packaged are spared as much as possible since they avoid hitting the bottom of the bag. This also has the advantage that the bottom seam of the bag to be filled is not stressed, so that filling is also possible before the bag seam has hardened by cooling. This contributes significantly to the achievement of a high working speed. The method according to the invention can also be imagined in such a way that packaging portions are enclosed in bags during their fall. If the ideal state is approximated as closely as possible, the bag is no longer loaded at all during filling. However, in order to ensure with sufficient certainty that the filling material is not welded into the transverse seams, it is advisable to maintain a certain difference between the speed of the material and the speed at which it is drawn off. Appropriate sizes for this are specified in claim 23.

In der Zeichnung ist ein Ausführungsbeispiel der Erfin­dung dargestellt. Es zeigen:

  • Fig. 1 in schematischer Darstellung eine Seiten­an-sicht einer Verpackungsmaschine,
  • Fig. 2 eine teilweise vertikal geschnittene Seiten­ansicht der Quersiegelstation, wobei jedoch die rotierenden Teile der Quersiegelstation zur Erhaltung der Übersichtlichkeit wegge­lassen sind,
  • Fig. 3 einen vertikalen Schnitt durch einen Siegel­backenträger entsprechend der Linie III-III in Fig. 1,
  • Fig. 4 einen Querschnitt durch zusammenwirkende Quersiegelbacken, die sich in der Siegel­stellung befinden entsprechend der Linie IV-IV in Fig. 5,
  • Fig. 5 eine Teildarstellung eines Siegelbacken­trägers, in der die Zuführung von Kühlluft zu den Quersiegelbacken dargestellt ist,
  • Fig. 6 einen Längsschnitt durch eine Kühlluftlei­ste nach Linie VI-VI in Fig. 5 und
  • Fig. 7 eine Ansicht auf Führungsbahnen für die Halter von Quersiegelbacken nach Linie VII-­VII in Fig. 3.
In the drawing, an embodiment of the invention is shown. Show it:
  • 1 is a schematic representation of a side view of a packaging machine,
  • 2 is a partially vertical sectional side view of the cross sealing station, but the rotating parts of the cross sealing station are omitted to maintain clarity,
  • 3 shows a vertical section through a sealing jaw carrier according to the line III-III in FIG. 1,
  • 4 shows a cross section through cooperating cross sealing jaws which are in the sealing position according to the line IV-IV in FIG. 5,
  • 5 is a partial representation of a sealing jaw carrier, in which the supply of cooling air to the cross sealing jaws is shown,
  • Fig. 6 is a longitudinal section through a cooling air strip according to line VI-VI in Fig. 5 and
  • 7 is a view of guideways for the holder of cross sealing jaws along line VII-VII in Fig. 3rd

Die Verpackungsmaschine hat ein Gestell 1, an dem alle Funktionsteile der Maschine befestigt sind. An einem obe­ren Vorsprung 1a ist eine Dosiereinrichtung 2 befestigt, die zu verpackende Portionen abgibt.The packaging machine has a frame 1 to which all functional parts of the machine are attached. A metering device 2, which delivers portions to be packaged, is attached to an upper projection 1a.

Die Portionen werden in ein Füllrohr 3 abgegeben und fal­len in aus einem Schlauch 4 zu formende Beutel. Der Schlauch 4 wird aus einem Hüllstoffband 5 geformt. In einer insge­samt mit 6 bezeichneten Quersiegelstation werden Beutel abgetrennt.The portions are dispensed into a filling tube 3 and fall into bags to be molded from a tube 4. The tube 4 is formed from a tape 5. Bags are separated in a cross-sealing station, denoted overall by 6.

Das Hüllstoffband 5 ist auf einer Bandrolle 7 gespeichert und wird über diverse Umlenkrollen 8, 9, 10 zu einer Form­ Sch-ulter 11 geführt. An der Formschulter 11 wird das Band 5 zu einem Schlauch geformt, an dem sich die Ränder des Bandes überlappen. Zur Verschweißung der überlappenden Ränder dient eine Längssiegelbacke 12, die vorzugsweise dauernd am Hüllstoff anliegt, also eine Art Schleifer bil­det. Zum kontinuierlich erfolgenden Abzug der Hüllstoffbahn längs dem Füllrohr 3 dienen zwei Abzugsriemen 13, die einan­der diametral gegenüberliegenden an der Hüllstoffbahn anlie­gen und diese durch Reibung mitnehmen. Die Abzugsriemen 13 werden mittels einer durch eine strichpunktierte Linie 14 symbolisierten Welle angetrieben.The wrapping material tape 5 is stored on a tape roll 7 and becomes a shape via various deflecting rollers 8, 9, 10 11 led. On the forming shoulder 11, the band 5 is formed into a tube on which the edges of the band overlap. A longitudinal sealing jaw 12 is used to weld the overlapping edges, which preferably rests permanently against the enveloping material, thus forming a type of grinder. Two take-off belts 13, which lie diametrically opposite one another on the cover sheet and serve to take it away by friction, serve for the continuous removal of the cover sheet along the filling tube 3. The trigger belt 13 is driven by means of a shaft symbolized by a dash-dotted line 14.

Der bis jetzt beschriebene Aufbau der Verpackungsmaschine ist bekannt. Neu ist die Quersiegelstation 6, die nachfol­gend beschrieben wird.The structure of the packaging machine described so far is known. The transverse sealing station 6 is new and is described below.

An der Vorderseite des Gestells 1 befinden sich Halteplat­ten 15, an denen Lagerplatten 16, 17 gehalten sind (siehe dazu auch Fig. 2). Parallel zu jeder Lagerplatte 16, 17 befindet sich eine weitere Lagerplatte 16a, 17a, die in Fig. 1 zu sehen ist. In Fig. 3 sind die ein Paar bilden­den Lagerplatten 17, 17a zu sehen. Die Lagerplatten 16, 16a, bilden ein weiteres Paar.At the front of the frame 1 there are holding plates 15, on which bearing plates 16, 17 are held (see also FIG. 2). Another bearing plate 16a, 17a, which can be seen in FIG. 1, is located parallel to each bearing plate 16, 17. In Fig. 3 the pair of bearing plates 17, 17a can be seen. The bearing plates 16, 16a form another pair.

Die Lagerplatten 16, 16a sind starr mit ihrer zugeordne­ten Halteplatte 15 verschraubt. Hierzu dienen Bolzen 18, die mehrfach abgesetzt sind und die mit einem vorderen Ge­windeteil 18a in die Lagerplatte 15 eingeschraubt sind und die Lagerplatte 16 mit einer Schulter 18b gegen die Lagerplatte pressen. Jeder Bolzen 18 hat einen Führungs­bereich 18c, auf dem die Lagerplatte 17 (bzw. 17a) ver­schiebbar ist. Beide Bolzen 18 sind über eine Brücke 19 miteinander verbunden, die mittels Muttern 20, 21 an den Bolzen 18 fixiert sind.The bearing plates 16, 16a are screwed rigidly to their associated holding plate 15. For this purpose there are bolts 18 which are stepped down several times and which are screwed into the bearing plate 15 with a front threaded part 18a and press the bearing plate 16 against the bearing plate with a shoulder 18b. Each bolt 18 has a guide area 18c on which the bearing plate 17 (or 17a) can be moved. Both bolts 18 are connected to one another via a bridge 19, which are fixed to the bolt 18 by means of nuts 20, 21.

Durch Verschraubung der Muttern, 20, 21 kann die Lage der Brücke 19 verändert werden. Jeder Bolzen 18 ist von einer Schraubendruckfeder 22 umgeben, die die Lagerplatte 17 in Richtung der Lagerplatte 16 zu drücken versucht. Der Bewegungsweg wird durch einen Zugbolzen 23 begrenzt, auf dem eine Einstellmutter 24 und eine Kontermutter 25 ver­schraubbar sind. Durch die Verstellmöglichkeiten ist so­wohl der Druck der Federn 22 veränderbar, als auch die An­schlagstellung.By screwing the nuts 20, 21, the position of the bridge 19 can be changed. Each bolt 18 is surrounded by a helical compression spring 22 which tries to press the bearing plate 17 in the direction of the bearing plate 16. The path of movement is limited by a tension bolt 23 on which an adjusting nut 24 and a lock nut 25 can be screwed. Both the pressure of the springs 22 and the stop position can be changed by the adjustment possibilities.

Die Quersiegelstation hat zwei, insgesamt mit 26 und 27 bezeichnete Siegelbackenträger. Die Siegelbackenträger 26, 27 sind gleich ausgebildet und werden am Beispiel des auch in Fig. 3 dargestellten Siegelbackenträgers 26 be­schrieben.The cross sealing station has two sealing jaw carriers, identified overall by 26 and 27. The sealing jaw carriers 26, 27 are of identical design and are described using the example of the sealing jaw carrier 26 also shown in FIG. 3.

Der Siegelbackenträger 26 hat eine Welle 28, die in Lagern 29, 30 drehbar gelagert ist. Die Lager 29, 30 sind in den Lagerplatten 17, 17a gehalten. Mit der Welle 28 sind Mit­nehmer 31, 32 drehfest verbunden. Jeder Mitnehmer 31, 32 hat diametral einander gegenüberliegend Arme. An jedem Arm befindet sich ein Führungsschlitz 33.The sealing jaw carrier 26 has a shaft 28 which is rotatably mounted in bearings 29, 30. The bearings 29, 30 are held in the bearing plates 17, 17a. With the shaft 28 drivers 31, 32 are rotatably connected. Each driver 31, 32 has arms diametrically opposite one another. There is a guide slot 33 on each arm.

In den Führungsschlitzen 33 sind Gleitstücke 34 derart ver­schiebbar, daß sich ihr Abstand von der Welle 28 ändern kann. In jedem Gleitstück 34 befindet sich ein Wälzlager 35 (siehe Fig. 5), in dem ein Siegelbackenhalter 36 dreh­bar gelagert ist.Sliders 34 are displaceable in the guide slots 33 such that their distance from the shaft 28 can change. In each slide 34 there is a roller bearing 35 (see FIG. 5) in which a sealing jaw holder 36 is rotatably mounted.

Der Siegelbackenhalter 36 hat zwei Führungsrollen 37 und 38 (siehe Fig. 3). Die Führungsrolle 37 ist konzentrisch zu dem benachbarten Lager innerhalb des Gleitstückes 34a und damit auch konzentrisch zur Schwenkachse 98 des Sie­gelbackenhalters 36. Die andere Führungsrolle 38 sitzt an einem Kurbelarm 39, der starr mit dem Siegelbackenhalter 36 verbunden ist. Die Achse der Führungsrolle 38 hat ei­nen Abstand von der Achse der Führungsrolle 37, die, wie gesagt, mit der Schwenkachse des Siegelbackenhalters 36 zusammenfällt. Dieser Abstand ist durch die Koordinaten a, b (siehe auch Fig. 7) definiert.The sealing jaw holder 36 has two guide rollers 37 and 38 (see FIG. 3). The guide roller 37 is concentric with the adjacent bearing within the slide 34a and thus also concentric with the pivot axis 98 of the sealing jaw holder 36. The other guide roller 38 is seated on a crank arm 39 which is rigidly connected to the sealing jaw holder 36. The axis of the guide roller 38 is at a distance from the axis of the guide roller 37, which, as said, with the pivot axis of the sealing jaw holder 36 coincides. This distance is defined by the coordinates a, b (see also FIG. 7).

Am Siegelbackenhalter 36 befindet sich eine weitere Füh­rungsrolle 37a, die koaxial zur Führungsrolle 37 ist und damit auch konzentrisch zu dem benachbarten Lager inner­halb des Gleitstückes 34.A further guide roller 37a is located on the sealing jaw holder 36, which is coaxial with the guide roller 37 and thus also concentric with the adjacent bearing within the slide 34.

Mit der Lagerplatte 17 ist eine Kurvenplatte 40 und mit der Lagerplatte 17a eine weitere Kurvenplatte 41 fest ver­bunden. In der Kurvenplatte 41 befindet sich eine Füh­rungsnut 42,in die die Führungsrolle 37 passend eingreift.A curve plate 40 is fixedly connected to the bearing plate 17 and a further curve plate 41 is firmly connected to the bearing plate 17a. In the cam plate 41 there is a guide groove 42 in which the guide roller 37 engages appropriately.

In der Kurvenplatte 40 befindet sich ebenfalls eine Füh­rungsnut 43, in die die Führungsrolle 38 passend eingreift.In the cam plate 40 there is also a guide groove 43, in which the guide roller 38 fits appropriately.

Die Führungsnuten 42, 43 sind in sich geschlossen und ha­ben die gleiche Form, wie dies in Fig. 7 dargestellt ist. Die Führungsnut 43, die hinter der Zeichenebene liegt, ist gegenüber der Führungsnut 42 in vertikaler Richtung paral­lel verschoben, nämlich um eine Strecke, die gleich dem Abstand zwischen den Achsen der Führungsrollen 37 und 38 ist (siehe dazu auch Fig. 3). Die Parallelverschiebung ist durch die bereits erwähnten Koordinaten a, b definiert. Der Achsabstand zwischen den Führungsrollen 37, 37a und 38 ist also

Figure imgb0001
The guide grooves 42, 43 are self-contained and have the same shape as shown in FIG. 7. The guide groove 43, which lies behind the plane of the drawing, is displaced parallel to the guide groove 42 in the vertical direction, namely by a distance which is equal to the distance between the axes of the guide rollers 37 and 38 (see also FIG. 3). The parallel shift is defined by the coordinates a, b already mentioned. The center distance between the guide rollers 37, 37a and 38 is thus
Figure imgb0001

Konzentrisch zur Führungsnut 42 ist eine weitere Führungs­nut 42a vorgesehen, die sich in einer weiteren Kurvenpla­te 40a befindet und in die die Führungsrollen 37a eingrei­fen. Die Führungsnuten 42, 42a, haben für die Steuerung der Drehlage der Siegelbackenhalter 36 die gleiche Funk­tion. Im Prinzip könnte deshalb z. B. die Führungsnut 42a weggelassen werden. Ihr Vorhandensein verbessert jedoch die Stabilität des Bewegungsmechanismus wesentlich und ist insbesondere dann von Nutzen, wenn die Siegelbacken eine große Länge haben.A further guide groove 42a is provided concentrically to the guide groove 42, which is located in a further cam plate 40a and into which the guide rollers 37a engage. The guide grooves 42, 42a have the same function for controlling the rotational position of the sealing jaw holder 36. In principle, z. B. the guide groove 42a may be omitted. However, their presence significantly improves the stability of the movement mechanism and is particularly useful when the sealing jaws are of great length.

Die strichpunktierte Linie 44 ist die Quermitte der Ver­packungsmaschine. Symmetrisch zu der durch die strich­punkierte Linie 44 definierten Ebene sind spiegelbild­lich weitere Kurvenplatten angeordnet, von denen eine Kurvenplatte 45 in Fig. 7 dargestellt ist. In der glei­chen Ebene wie die Kurvenplatte 40 liegt eine in der Zeichnung nicht dargestellte Kurvenplatte, die in Fig.7 vor der Zeichenebene liegen würde.The dash-dotted line 44 is the transverse center of the packaging machine. Further curve plates, of which one curve plate 45 is shown in FIG. 7, are arranged mirror-symmetrically to the plane defined by the dash-dotted line 44. In the same plane as the curve plate 40 is a curve plate, not shown in the drawing, which would lie in front of the drawing plane in FIG.

Die Form der Führungsnuten 42, 42a, 43 ist wie folgt. Fig. 3 zeigt, daß die Nuten einen rechteckigen Querschnitt haben. Der Abschnitt A-B (siehe Fig. 7) ist kreisbogenför­mig, wobei der mittlere Radius R des Kreisbogens seinen Mittelpunkt auf der Achse der Welle 28 hat. Die Abschnit­te B-C und D-A sind gekrümmte Übergangsabschnitte, die beide gleich ausgebildet sein können und von einem Kreis­bogen abweichen können. Der Abschnitt C-D ist geradlinig. In diesem Abschnitt bewegen sich die Führungsrollen wäh­rend des Siegel- und Abschneidvorganges.The shape of the guide grooves 42, 42a, 43 is as follows. Fig. 3 shows that the grooves have a rectangular cross section. The section A-B (see FIG. 7) is in the form of a circular arc, the central radius R of the circular arc having its center on the axis of the shaft 28. The sections B-C and D-A are curved transition sections, which can both be of the same design and can deviate from an arc. The section C-D is straight. In this section, the guide rollers move during the sealing and cutting process.

Die Siegelbackenträger 26 und 27 werden mit entgegengesetz­ten Richtungen angetrieben in Richtung der Drehrichtungs­pfeile 46, 47 (siehe Fig. 1). Zu diesem Zweck wird die Welle 28 (siehe Fig. 3) über eine Antriebskette 48 ange­trieben, die in ein Kettenrad 49 eingreift, das drehfest mit der Welle 28 verbunden ist. Mit der Welle 28 ist auch drehfest ein Zahnrad 50 verbunden, das in Fig. 2 durch ei­ne strickpunktierte Linie symbolisiert ist. Dieses Zahn­rad 50 kämmt mit einem gleichgroßen Zahnrad 51, das dreh­fest mit der Welle des anderen Siegelbackenträgers ver­bunden ist.The sealing jaw carriers 26 and 27 are driven in opposite directions in the direction of the arrows 46, 47 (see FIG. 1). For this purpose, the shaft 28 (see FIG. 3) is driven via a drive chain 48 which engages in a chain wheel 49 which is connected to the shaft 28 in a rotationally fixed manner. A gear 50 is also connected in a rotationally fixed manner to the shaft 28, which is symbolized in FIG. 2 by a chain-dotted line. This gear 50 meshes with a gear 51 of the same size, which is non-rotatably connected to the shaft of the other sealing jaw carrier.

Nachfolgend wird anhand der Fig. 4 bis 6 die Ausbildung der Siegelbackenhalter, der daran befestigten Siegelbacken sowie die Ausbildung von Kühlleisten beschrieben, die mit den Siegelbacken verbunden sind.The formation of the sealing jaw holder, the sealing jaws attached to it and the formation of cooling strips which are connected to the sealing jaws are described below with reference to FIGS. 4 to 6.

Jeder Siegelbackenhalter 36 hat Lagerzapfen 52, an denen sie in den schon erwähnten Wälzlagern 35 gelagert sind. An jedem Ende eines Siegelbackenhalters 36 ist eine sol­che Lagerung vorgesehen. An dem in Fig. 5 gezeigten La­gerende ist auch die Zuführung von Kühlluft dargestellt.Each sealing jaw holder 36 has trunnions 52 on which they are mounted in the roller bearings 35 already mentioned. Such storage is provided at each end of a sealing jaw holder 36. At the end of the bearing shown in FIG. 5, the supply of cooling air is also shown.

Die Kühlluft wird über eine Kühlluftleitung 53 zugeführt, die an einen feststehenden Drehverteiler 54 angeschlossen ist. Der Drehverteiler sitzt auf den äußeren Enden der Wellen 28, 94 und wird am Drehen durch einen Bügel 55 ge­hindert, der an einer Lagerplatte 15 befestigt ist. In jeder Welle 28, 94 befindet sich eine Längsbohrung 56, die über den Drehverteiler 54 mit der Kühlluftleitung 53 kommuniziert. Das Lager 35 ist nach außen mittels einer Wellendichtung 57 abgedichtet, die in einem Deckel 58 sitzt, der mit dem Gleitstück 34 verschraubt ist, in dem der Siegelbackenhalter 36 drehbar gelagert ist.The cooling air is supplied via a cooling air line 53, which is connected to a fixed rotary distributor 54. The rotary distributor sits on the outer ends of the shafts 28, 94 and is prevented from rotating by a bracket 55 which is attached to a bearing plate 15. In each shaft 28, 94 there is a longitudinal bore 56 which communicates with the cooling air line 53 via the rotary distributor 54. The bearing 35 is sealed to the outside by means of a shaft seal 57 which is seated in a cover 58 which is screwed to the slide 34 in which the sealing jaw holder 36 is rotatably mounted.

Im Gleitstück 34 befindet sich eine ringförmige Luftkammer 59, die nach außen mittels Wellendichtungen 60, 61 abge­dichtet ist. Die Luftkammer 59 kommuniziert mit der Kühl­luftleitung 56 in der Welle 28 über eine Querbohrung 62 in der Welle 94, einen an die Querbohrung 62 angeschlosse­nen Schlauch 63 und eine im Gleitstück 35 befindliche Boh­rung 64.In the slider 34 there is an annular air chamber 59 which is sealed to the outside by means of shaft seals 60, 61. The air chamber 59 communicates with the cooling air line 56 in the shaft 28 via a transverse bore 62 in the shaft 94, a hose 63 connected to the transverse bore 62 and a bore 64 in the slide 35.

Die Luftkammer 59 kommuniziert über mindestens eine Boh­rung 65 mit einem Hohlraum 66 im Siegelbackenträger 36. Vom Hohlraum 66 geht ein Luftkanal 67 aus, an den ein Schlauch 68 angeschlossen ist, der zu einer Kühlluftlei­ste 69 führt. Diese Kühlluftleiste 69 ist in Fig. 6 im Schnitt dargestellt.The air chamber 59 communicates via at least one bore 65 with a cavity 66 in the sealing jaw carrier 36. An air channel 67 extends from the cavity 66, to which a hose 68 is connected, which leads to a cooling air strip 69. This cooling air strip 69 is shown in section in FIG. 6.

Die Kühlluftleiste 69 enthält einen Sammelraum 70 in Form einer großvolumigen Bohrung. An diesen Sammelraum ist der genannte Schlauch 68 über eine Schlauchtülle 71 angeschlos­sen. Parallel zum Sammelraum 70 erstreckt sich eine Ver­teilerbohrung 72, von der mehrere Düsen 73 ausgehen, die an einer Außenfläche 74 der Kühlluftleiste 69 münden. Die Verteilerbohrung ist nach außen durch eine Verschlußschrau­be 75 abgeschlossen. Die Verteilerbohrung 72 ist in ihren Endbereichen über Querbohrungen 76, 77 mit dem Sammelraum 70 verbunden. Die Querbohrungen 76, 77 reichen bis zu ei­ner Endfläche 78 der Kühlluftleiste und sind dort mittels Schrauben 79, 80 verschlossen. Die Schrauben 79, 80 bil­den zugleich verstellbare Drosselelemente. Je tiefer die­se Schrauben eingeschraubt werden, desto kleiner wird der Querschnitt der Strömungsverbindung zwischen dem Sammel­raum 70 und den Querbohrungen 76, 77. Dadurch läßt sich die durchströmende Luftmenge bei einem gegebenen Druck einstellen und auch die Verteilung auf die einzelnen Dü­sen regulieren.The cooling air strip 69 contains a collecting space 70 in the form of a large-volume bore. Said hose 68 is connected to this collecting space via a hose nozzle 71. A distributor bore 72 extends parallel to the collecting space 70, from which a plurality of nozzles 73 extend open on an outer surface 74 of the cooling air strip 69. The distributor bore is closed off from the outside by a screw plug 75. The distributor bore 72 is connected in its end regions to the collecting space 70 via transverse bores 76, 77. The transverse bores 76, 77 extend to an end surface 78 of the cooling air strip and are closed there by means of screws 79, 80. The screws 79, 80 also form adjustable throttle elements. The deeper these screws are screwed in, the smaller the cross section of the flow connection between the collecting chamber 70 and the transverse bores 76, 77. This allows the amount of air flowing through to be set at a given pressure and also the distribution to the individual nozzles to be regulated.

Wie Fig. 6 zeigt, sind die Kühlluftleisten 69 auf die Quer­siegelbacken 81 bzw. 82 aufgesetzt. Die Luftdüsen 73 sind so orientiert, daß sie Luft in den Bereich der Siegelnaht 83 lenken.As shown in FIG. 6, the cooling air strips 69 are placed on the transverse sealing jaws 81 and 82, respectively. The air nozzles 73 are oriented in such a way that they direct air into the area of the sealing seam 83.

An den Quersiegelbacken 82 eines Siegelbackenträgers be­finden sich Schneidmesser. Im dargestellten Fall sind die Schneidmesser an den Quersiegelbacken 82 des Siegelbacken­trägers 26 vorgesehen.Cutting knives are located on the transverse sealing jaws 82 of a sealing jaw carrier. In the case shown, the cutting knives are provided on the transverse sealing jaws 82 of the sealing jaw carrier 26.

In der Siegelbacke 82 befindet sich ein Führungsschlitz 84, in dem ein Messer 85 gleitbar ist. Das Messer hat eine Schneide 85a. Am Rücken des Messers 85 ist ein kolbenar­tiges Führungsstück 86 befestigt, das in einer Buchse 87 gleitbar ist, die in die Quersiegelbacke 82 eingelassen ist. Am Führungsstück 86 befindet sich eine Stange 88, die in den Siegelbackenhalter 36 eingreift. Die Stange 88 ist von einer Schraubendruckfeder 89 umgeben, die sich mit ei­nem Ende am Boden einer Ausnehmung 90 abstützt, die sich im Siegelbackenträger 36 befindet, während das andere En­de an einer Mutter 91 abgestützt ist, die auf ein Gewinde der Stange 88 aufgeschraubt ist. Die Feder 89 ist vorge­spannt. Ihre Vorspannung läßt sich durch mehr oder weniger weites Aufschrauben der Mutter 91 regulieren.In the sealing jaw 82 there is a guide slot 84 in which a knife 85 can be slid. The knife has a cutting edge 85a. A piston-like guide piece 86 is fastened to the back of the knife 85 and can be slid in a bushing 87 which is embedded in the transverse sealing jaw 82. On the guide piece 86 there is a rod 88 which engages in the sealing jaw holder 36. The rod 88 is surrounded by a helical compression spring 89 which is supported at one end on the bottom of a recess 90 which is located in the sealing jaw carrier 36, while the other end is supported on a nut 91 which is screwed onto a thread of the rod 88. The spring 89 is biased. Their pretension can be regulated by screwing the nut 91 more or less far.

Das hintere Ende 88a der Stange 88 bildet eine Tastfläche, die mit einer Steuerfläche 92a zusammenwirkt, z. B. der zylindrischen Außenfläche eines Ringes 92, der auf die Wel­le 94 aufgesetzt ist.The rear end 88a of the rod 88 forms a tactile surface which interacts with a control surface 92a, e.g. B. the cylindrical outer surface of a ring 92 which is placed on the shaft 94.

In der gegenüberliegenden Quersiegelbacke 81 befindet sich eine Ausnehmung 93, in die das Messer 85 während eines Schneidvorganges eintauchen kann. Aus Fig. 4 ist ohne wei­teres ersichtlich, daß bei einer vertikalen Abwärtsbewe­gung der Quersiegelbacken 81, 82 das Führungstück 86 unter Überwindung der Vorspannkraft der Feder 89 nach links ge­drückt wird, wobei das Stangenende 88a auf der Fläche 92a entlanggleitet. Die Feder 89 hält den Kontakt mit der Flä­che 92 aufrecht und bewirkt auch das Zurückdrücken des Mes­sers 85 in die gezeichnete Ruhestellung, wenn die Steuer­fläche 92a passiert ist. Um ein Verkanten eines breiten Messers zu vermeiden, können zwei Stößel 86, 88 vorgese­hen werden.In the opposite transverse sealing jaw 81 there is a recess 93 into which the knife 85 can dip during a cutting process. From Fig. 4 it is readily apparent that when the cross sealing jaws 81, 82 move vertically downward, the guide piece 86 is pushed to the left while overcoming the biasing force of the spring 89, the rod end 88a sliding along the surface 92a. The spring 89 maintains contact with the surface 92 and also causes the knife 85 to be pushed back into the drawn rest position when the control surface 92a has passed. To prevent a wide knife from tilting, two plungers 86, 88 can be provided.

Die Verpackungsmaschine arbeitet wie folgt. Es sei der einfache Fall angenommen, daß sowohl die Abzugsgeschwin­digkeit des Hüllstoffschlauches 4 als auch die Winkelge­schwindigkeit der Wellen 28 und 94 konstant seien. Diese Geschwindigkeiten stehen in einem bestimmten Verhältnis zueinander, die der gewünschten Beutellänge entspricht. Wenn lange Beutel hergestellt werden sollen, ist die Ab­zugsgeschwindigkeit für den Folienschlauch 4 relativ hoch. Falls kürzere Beutel hergestellt werden sollen, ist die Abzugsgeschwindigkeit im Verhältnis zur Winkelgeschwindig­keit der Wellen 28, 94 relativ kleiner. Das Verhältnis kann beliebig geändert werden. Zu diesem Zweck besteht ei­ne getriebemäßige Verbindung zwischen den Antriebswellen 14 für die Abzugsriemen und demjenigen Kettenrad 95, von dem aus über die Kette 48 die beiden Siegelbackenhalter 26, 27 gegenläufig angetrieben werden.The packaging machine works as follows. The simple case is assumed that both the pull-off speed of the enveloping tube 4 and the angular speed of the shafts 28 and 94 are constant. These speeds are related to each other, which corresponds to the desired bag length. If long bags are to be produced, the pull-off speed for the film tube 4 is relatively high. If shorter bags are to be produced, the take-off speed is relatively lower in relation to the angular speed of the shafts 28, 94. The ratio can be changed as desired. For this purpose, there is a transmission-type connection between the drive shafts 14 for the trigger belt and that sprocket 95 from which the two sealing jaw holders 26, 27 are driven in opposite directions via the chain 48.

Durch den Eingriff jedes Siegelbackenhalters 36 in zwei parallel zueinander versetzte Führungsnuten 42, 43 wird erreicht, daß die Siegelbackenhalter auf ihrem gesamten Umlauf eine horizontale Lage beibehalten. Zwei Quersie­gelbacken 81, 82 nähern sich schräg von oben dem Folien­schlauch und sind mit diesem nach dem Durchlaufen der Über­gangsbereiche A-D in der in den Fig. 1 und 4 dargestellten Lage, in der die Quersiegelbacken 81, 82 die beiden zu verschweißenden Hüllstofflagen gegeneinander pressen und durch Wärmeeinwirkung miteinander versiegeln. Hierdurch wird ein noch zu füllender oberer Beutel 96 mit einer Bo­dennaht 96a versehen, während ein unterer bereits gefüll­ter Beutel 97 mit einer Kopfnaht 97b versehen wird. Die Bodennaht 97a wurde schon bei einem vorhergehenden Arbeits­zyklus gebildet. Unmittelbar nach dem Festklemmen der Hüll­stofflagen durch die Quersiegelbacken 81, 82 kann Füllgut eingegeben werden.The engagement of each sealing jaw holder 36 in two guide grooves 42, 43 offset parallel to one another ensures that the sealing jaw holders maintain a horizontal position over their entire circumference. Two transverse sealing jaws 81, 82 approach the film tube obliquely from above and, after passing through the transition areas AD, are in the position shown in FIGS. 1 and 4, in which the transverse sealing jaws 81, 82 press the two layers of enveloping material to be welded against one another and through Seal the effects of heat together. As a result, an upper bag 96 which is still to be filled is provided with a bottom seam 96a, while a lower already filled bag 97 is provided with a top seam 97b. Bottom seam 97a was formed in a previous cycle. Immediately after the layers of enveloping material have been clamped by the transverse sealing jaws 81, 82, filling material can be entered.

Im Verlaufe der Abwärtsbewegung der Quersiegelbacken 81, 82 erfolgt die Abtrennung des unteren Beutels 97 mittels des Messers 85, das durch Auflaufen auf die Steuerfläche 92a nach links bewegt wird. Die Durchtrennung kann schon im Anfangsbereich der Abwärtsbewegung der Quersiegelbacken 81, 82 erfolgen, da der untere Beutel 97 auch nach der Durchtrennung infolge seiner Festklemmung durch die Quer­siegelbacken 81, 92 nicht abfallen kann.In the course of the downward movement of the transverse sealing jaws 81, 82, the lower bag 97 is separated by means of the knife 85, which is moved to the left by running onto the control surface 92a. The severing can take place in the initial region of the downward movement of the transverse sealing jaws 81, 82, since the lower pouch 97 cannot fall off even after the severing due to its being clamped by the transverse sealing jaws 81, 92.

Die Quersiegel- und Abschneidstation ist durchlaufen, wenn die Führungsrollen 37 am Punkt C angelangt sind. Die Quer­siegelbacken laufen nun auseinander, wodurch der untere Beutel 97 freigegeben wird und nach unten fällt.The cross sealing and cutting station has passed when the guide rollers 37 have reached point C. The cross sealing jaws now diverge, whereby the lower bag 97 is released and falls down.

Nachdem sich die Quersiegelbacken 81, 82 von der Naht weg­bewegt haben ist der nachfolgende Beutel bereits gefüllt und die diametral gegenüberliegenden Quersiegelbacken 81a, 82a haben sich dem Folienschlauch 4 bereits weitgehend an­ genähert. Sie kommen schon bald nachdem sich die Quersie­gelbacken 81a, 82a gelöst haben mit dem Folienschlauch in Berührung wonach der beschriebene Zyklus erneut abläuft.After the transverse sealing jaws 81, 82 have moved away from the seam, the subsequent pouch has already been filled and the diametrically opposite transverse sealing jaws 81a, 82a have largely become attached to the film tube 4 approached. They come into contact with the film tube soon after the cross-sealing jaws 81a, 82a have come loose, after which the cycle described runs again.

Aus Fig. 7 ist am leichtesten zu erkennen, daß zwischen den Punkten D und C bei konstanter Winkelgeschwindigkeit der Wellen 28, 94 sich die Abwärtsgeschwindigkeit der Quer­siegelbacken zunächst verringert, da der Abstand vom Dreh­zentrum zunächst abnimmt und danach wieder erhöht wegen Zunahme des Abstandes vom Drehzentrum. Diese Geschwindig­keitsschwankung kann jedoch in der Regel toleriert werden, da die Füllung des Beutels diesen ausbeult, so daß Stau­chungen im Folienschlauch nicht entstehen. Es ist jedoch möglich, die Bewegungsgeschwindigkeit der Quersiegelbacken genau an die Abzugsgeschwindigkeit des Folienschlauches 4 anzupassen. Hierfür gibt es drei Möglichkeiten. Die erste Möglichkeit besteht darin, daß die Winkelgeschwindigkeit der Wellen 28, 94 zwischen den Bahnpunkten D und C zu­nächst vergrößert und dann wieder verringert wird. Die zwei­te Möglichkeit besteht darin, daß durch Änderung der Win­kelgeschwindigkeit der Antriebswellen 14 der Abzugsriemen 13 die Abzugsgeschwindigkeit zunächst verlangsamt und dann wider erhöht wird. Die dritte Möglichkeit besteht darin, daß sowohl die Winkelgeschwindigkeit der Wellen 28, 94 in­nerhalb der Quersiegelzone verändert wird als auch die Ab­zugsgeschwindigkeit des Folienschlauches 4. Solche Abstim­mungen können mit konventionellen Mitteln erfolgen, wobei dem Fachmann hierfür sowohl rein mechanische als auch elek­tronische Lösungen zur Verfügung stehen.From Fig. 7 it can be seen most easily that between points D and C at a constant angular velocity of the shafts 28, 94 the downward speed of the cross sealing jaws initially decreases because the distance from the center of rotation first decreases and then increases again because of the distance from the center of rotation . However, this speed fluctuation can generally be tolerated, since the filling of the bag bulges it out, so that there are no upsets in the film tube. However, it is possible to adapt the movement speed of the cross sealing jaws exactly to the pull-off speed of the film tube 4. There are three ways to do this. The first possibility is that the angular velocity of the shafts 28, 94 between the path points D and C is first increased and then reduced again. The second possibility is that by changing the angular speed of the drive shafts 14 of the trigger belt 13, the trigger speed is first slowed down and then increased again. The third possibility is that both the angular speed of the shafts 28, 94 within the cross-sealing zone is changed and the pull-off speed of the film tube 4. Such adjustments can be made using conventional means, with purely mechanical and electronic solutions being available to the person skilled in the art .

Die Übergangsbereiche A-D und C-B der Steuernuten 42, 43 können im Hinblick auf möglichst geringe Beschleunigungen optimiert werden, wodurch die Massenkräfte niedrig gehal­ten werden.The transition areas AD and CB of the control grooves 42, 43 can be optimized with regard to the lowest possible accelerations, as a result of which the inertial forces are kept low.

Für eine Veränderung der Beutellänge ist es erforderlich, die Umfangsgeschwindigkeit der Abzugsriemen 13 im Verhält­nis zur Drehgeschwindigkeit der Siegelbackenträger 26, 27 zu ändern. Zu diesem Zweck ist zwischen dem Antrieb 101 für die Siegelbackenträger 26, 27 und einer Antriebswel­le 102 für die Abzugsriemen 13 eine Getriebeverbindung 103 vorgesehen, die in der Zeichnung nur symbolisch durch eine strichpunktierte Linie angedeutet ist. Die Getrie­beverbindung 103 gestattet die Veränderung des Drehzahl­verhältnisses zwischen den Siegelbackenträgern 26, 27 und der Welle 102. Anstelle einer mechanischen Getriebe­verbindung kann auch eine elektrische Welle vorgesehen sein, z.B. auch eine solche mit Schrittmotor. Außer die­sen Möglichkeiten kann jede bekannte Methode verwendet werden, mit der das Drehzahlverhältnis zwischen zwei Wel­len geändert werden kann. Gleichzeitig mit der genann­ten Veränderung des Drehzahlverhältnisses kann der An­trieb 101 so verstellt werden, daß die Winkelgeschwindig­keit der Siegelbackenträger ungleichförmig wird, um so zu erreichen, daß die Bewegungsgeschwindigkeit der Sie­gelbacken 81, 82 im Bereich D-C (siehe Fig. 7) der Bewe­gungsgeschwindigkeit des Folienschlauches angeglichen wird.To change the length of the bag, it is necessary to change the peripheral speed of the take-off belts 13 in relation to the rotational speed of the sealing jaw carriers 26, 27. For this purpose, a gear connection 103 is provided between the drive 101 for the sealing jaw carriers 26, 27 and a drive shaft 102 for the trigger belt 13, which is indicated only symbolically in the drawing by a dash-dotted line. The gear connection 103 allows the speed ratio between the sealing jaw carriers 26, 27 and the shaft 102 to be changed. Instead of a mechanical gear connection, an electrical shaft can also be provided, e.g. also one with a stepper motor. In addition to these possibilities, any known method can be used to change the speed ratio between two shafts. Simultaneously with the above-mentioned change in the speed ratio, the drive 101 can be adjusted so that the angular velocity of the sealing jaw carriers becomes non-uniform in order to achieve that the speed of movement of the sealing jaws 81, 82 in the DC region (see FIG. 7) matches the speed of movement of the film tube becomes.

Claims (22)

1. Verpackungsmaschine zum Herstellen von Beuteln aus ei­nem Hüllstoffband aus heißversiegelbarem Material und zum Füllen und Verschließen der Beutel, mit einem vorzugsweise vertikal verlaufenden Füllrohr, das von einer Formschulter umgeben ist, an der das Hüllstoffband zu einem Schlauch formbar ist, einem Längssiegelorgan zur Verbindung der sich überlappenden Ränder der Hüllstoffbahn und einer Quer­siegelstation, die hinter dem Ausgangsende des Füllrohres angeordnet ist und Quersiegelbacken aufweist, die an zwei um parallele Achsen synchron und gegenläufig drehbaren Sie­gelbackenträgern angeordnet sind, wobei jede Quersiegelbak­ke von einem relativ zum zugeordneten Siegelbackenträger schwenkbaren Backenhalter gehalten ist, dadurch gekenn­zeichnet, daß zum Abzug des Hüllstoffbandes (5) ständig umlaufende Hüllstofförderer (13) in Form von Abzugsrollen oder Abzugsbändern vorgesehen sind, die im Bereich unter­halb der Formschulter (11) mit Reibschluß am Hüllstoff (5) anliegen und daß das Verhältnis zwischen der Umfangsge­schwindigkeit der Hüllstofförderer (13) und der Siegel­backenträger (26, 27) einstellbar ist, wobei die Bewegungs­geschwindigkeit der Siegelbacken (81, 82) während ihres Kontaktes mit dem Folienschlauch (4) etwa gleich oder klei­ner ist als die Umfangsgeschwindigkeit der Hüllstofförderer (13).1. Packing machine for producing bags from a wrapping tape made of heat-sealable material and for filling and closing the bags, with a preferably vertical filling tube, which is surrounded by a shaped shoulder on which the wrapping tape can be formed into a tube, a longitudinal sealing element for connecting the overlapping edges of the wrapping material web and a transverse sealing station which is arranged behind the outlet end of the filling tube and has transverse sealing jaws which are arranged on two sealing jaw carriers which can be rotated synchronously and in opposite directions about parallel axes, each transverse sealing jaw being held by a jaw holder which can be pivoted relative to the associated sealing jaw carrier characterized in that for the removal of the wrapping material belt (5) continuously rotating wrapping material conveyors (13) are provided in the form of take-off rollers or take-off belts which rest in the area below the shaped shoulder (11) with frictional engagement on the wrapping material (5) and that The ratio between the peripheral speed of the envelope conveyors (13) and the sealing jaw carrier (26, 27) can be adjusted, the speed of movement of the sealing jaws (81, 82) during their contact with the film tube (4) being approximately the same or less than the peripheral speed of the envelope conveyor ( 13). 2. Verpackungsmaschine nach Anspruch 1, dadurch gekennzeich­net, daß die genannten Achsen (28, 94) ortsfest angeordnet sind, daß die Siegelbackenhalter (36) in den Siegelbacken­trägern (26, 27) radial verschiebbar sind und daß jeder Siegelbackenhalter (36) zwei Führungselemente (37, 38) auf­weist, von denen jedes an einer Führungsbahn eines Führungs­bahnen-Paares (42, 43) geführt ist, wobei die Führungsbah­nen in sich geschlossen sind und beide Führungsbahnen (42, 43) die gleiche Form haben, jedoch parallel zueinander ver­ schoben sind und die Quersiegelbacken (81, 81a, 82, 82a) mindestens im Bereich der Siegelzone (D-C), in der die Quer­siegelbacken (81, 81a, 82, 82a) geradlinig in Abzugsrich­tung des Hüllstoffschlauches (4) verlaufen, rechtwinklig zum Hüllstoffschlauch (4) orientiert sind.2. Packaging machine according to claim 1, characterized in that said axes (28, 94) are arranged in a fixed position, that the sealing jaw holder (36) in the sealing jaw carriers (26, 27) are radially displaceable and that each sealing jaw holder (36) has two guide elements ( 37, 38), each of which is guided on a guideway of a pair of guideways (42, 43), the guideways being closed and both guideways (42, 43) having the same shape, but ver parallel to each other are pushed and the cross-sealing jaws (81, 81a, 82, 82a) at least in the area of the sealing zone (DC), in which the cross-sealing jaws (81, 81a, 82, 82a) run in a straight line in the pull-off direction of the envelope tube (4), at right angles to the envelope tube ( 4) are oriented. 3. Verpackungsmaschine nach Anspruch 2, gekennzeichnet durch eine dritte Führungsbahn (42a), die zu einer (42) der ge­nannten Führungsbahnen (42, 43) konzentrisch ist, wobei an jeder Seite der Siegelbackenhalter (36) eine der zueinan­der konzentrischen Führungsbahnen (42, 42a) angeordnet ist.3. Packaging machine according to claim 2, characterized by a third guideway (42a) which is concentric to one (42) of said guideways (42, 43), with on each side of the sealing jaw holder (36) one of the mutually concentric guideways (42, 42a) is arranged. 4. Verpackungsmaschine nach einem der Ansprüche 2 und 3, da­durch gekennzeichnet, daß jeder Siegelbackenträger (26, 27) eine Welle (28, 94) aufweist, mit der zwei Führungsteile (31, 32) drehfest verbunden sind, zwischen denen sich die Siegelbackenhalter (36) erstrecken.4. Packaging machine according to one of claims 2 and 3, characterized in that each sealing jaw carrier (26, 27) has a shaft (28, 94) with which two guide parts (31, 32) are rotatably connected, between which the sealing jaw holder ( 36) extend. 5. Verpackungsmaschine nach einem der Ansprüche 2 bis 4, da­durch gekennzeichnet, daß die Backenhalter (36) mit Lager­zapfen (52) in Gleitstücke (34) eingreifen, die in den Sie­gelbackenhaltern (26, 27) verschiebbar sind.5. Packaging machine according to one of claims 2 to 4, characterized in that the jaw holder (36) with bearing pins (52) engage in sliders (34) which are displaceable in the sealing jaw holders (26, 27). 6. Verpackungsmaschine nach einem der Ansprüche 2 bis 5, da­durch gekennzeichnet, daß die Führungsbahnen (42, 42a, 43) als Nuten ausgebildet sind, in die die vorzugsweise als Rol­len ausgebildeten Führungselemente (37, 37a, 38) passend eingreifen.6. Packaging machine according to one of claims 2 to 5, characterized in that the guide tracks (42, 42a, 43) are designed as grooves in which the guide elements (37, 37a, 38), which are preferably designed as rollers, engage appropriately. 7. Verpackungsmaschine nach einem der Ansprüche 2 bis 6, da­durch gekennzeichnet, daß eine Führungsbahn eines Führungs­bahnen-Paares (42, 42a, 43) auf einer Seite und die andere Führungsbahn auf der anderen Seite des zugeordneten Siegel­backenträgers (26, 27) angeordnet ist.7. Packaging machine according to one of claims 2 to 6, characterized in that a guideway of a pair of guideways (42, 42a, 43) is arranged on one side and the other guideway on the other side of the associated sealing jaw carrier (26, 27). 8. Verpackungsmaschine nach einem der Ansprüche 2 bis 7, da­ durch gekennzeichnet, daß ein Führungselement (37) zur Schwenkachse (98) des zugeordneten Backenhalters (36) kon­zentrisch ist und das andere Führungselement (38) an einem von der Schwenkachse (98) abstrebenden Kurbelarm (39) an­geordnet ist.8. Packaging machine according to one of claims 2 to 7, there characterized in that one guide element (37) is concentric with the pivot axis (98) of the associated jaw holder (36) and the other guide element (38) is arranged on a crank arm (39) striving from the pivot axis (98). 9. Verpackungsmaschine nach Anspruch 8, dadurch gekennzeich­net, daß im Falle von zwei zueinander konzentrischen Füh­rungsbahnen (42, 42a) nach Anspruch 2 in diese Führungsele­mente (34, 37a) eingreifen, die zur Schwenkachse des zuge­ordneten Backenhalters (36) konzentrisch sind.9. Packaging machine according to claim 8, characterized in that in the case of two mutually concentric guide tracks (42, 42a) according to claim 2 engage in these guide elements (34, 37a) which are concentric with the pivot axis of the associated jaw holder (36). 10. Verpackungsmaschine nach einem der Ansprüche 2 bis 9, dadurch gekennzeichnet, daß an jedem Siegelbackenträger (26, 27) diametral zueinander zwei Quersiegelbacken (81, 81a bzw. 82, 82a) angeordnet sind.10. Packaging machine according to one of claims 2 to 9, characterized in that on each sealing jaw carrier (26, 27) two transverse sealing jaws (81, 81a and 82, 82a) are arranged diametrically to one another. 11. Verpackungsmaschine nach einem der Ansprüche 2 bis 10, dadurch gekennzeichnet, daß jede Führungsbahn (42, 42a, 43) einen kreisförmigen Abschnitt (A-B) hat, der sich vorzugs­weise über mindestens 180° erstreckt, wobei im Falle des Anspruches 7 der kreisförmige Abschnitt (A-B) einer Füh­rungsbahn eines Führungsbahnen-Paares (42, 43) konzentrisch zur Drehachse (28, 94) des zugeordneten Siegelbackenträgers (26, 27) ist und daß an den kreisförmigen Abschnitt (A-B) gekrümmte Übergangsabschnitte (A-D, B-C) anschließen, die in einen geraden Abschnitt (D-C) übergehen, die sich paral­lel zur Abzugsrichtung des Hüllstoffschlauches (5) erstrek­ken.11. Packaging machine according to one of claims 2 to 10, characterized in that each guide track (42, 42a, 43) has a circular section (AB), which preferably extends over at least 180 °, wherein in the case of claim 7, the circular section (AB) a guideway of a pair of guideways (42, 43) is concentric to the axis of rotation (28, 94) of the associated sealing jaw carrier (26, 27) and that curved transition sections (AD, BC) connect to the circular section (AB) merge into a straight section (DC), which extend parallel to the withdrawal direction of the enveloping tube (5). 12. Verpackungsmaschine nach einem der vorhergehenden An­sprüche, dadurch gekennzeichnet, daß die Siegelbackenträger (26, 27) relativ zueinander derart federnd nachgiebig sind, daß sie unter Überwindung einer Vorspannung auseinanderdrück­bar sind.12. Packaging machine according to one of the preceding claims, characterized in that the sealing jaw carriers (26, 27) are resiliently flexible relative to one another in such a way that they can be pressed apart while overcoming a pretension. 13. Verpackungsmaschine nach Anspruch 12, dadurch gekenn­ zeichnet, daß ein Siegelbackenträger (27) ortsfest und der andere (26) gleitbar angeordnet ist und mittels Federn (22) in Richtung des anderen Siegelbackenträgers (27) gedrückt ist, wobei der Bewegungsweg des beweglichen Siegelbacken­trägers (26) durch einen Anschlag (24) begrenzt ist, der vorzugsweise verstellbar ist.13. Packaging machine according to claim 12, characterized shows that one sealing jaw carrier (27) is stationary and the other (26) is slidably arranged and is pressed in the direction of the other sealing jaw carrier (27) by means of springs (22), the movement path of the movable sealing jaw carrier (26) being stopped by a stop (24) is limited, which is preferably adjustable. 14. Verpackungsmaschine nach einem der vorhergehenden An­sprüche, dadurch gekennzeichnet, daß in den Quersiegelbak­ken (82, 82a) eines Siegelbackenträgers ein Messer (85) zum Abschneiden gefüllter und verschlossener Beutel (97) vorge­sehen ist, wobei zur Betätigung des Messern (85) mindestens ein auf dieses einwirkender Stößel (86, 88) mit einer Betä­tigungsfläche zusammenwirkt, vorzugsweise einer konvexen Fläche, vorzugsweise einer zylindrischen Fläche (92a), die sich auf einer Welle (28) oder Achse des Siegelbackenträ­gers gefindet.14. Packaging machine according to one of the preceding claims, characterized in that a knife (85) for cutting filled and closed bags (97) is provided in the transverse sealing jaws (82, 82a) of a sealing jaw carrier, at least one for actuating the knife (85) on this acting plunger (86, 88) cooperates with an actuating surface, preferably a convex surface, preferably a cylindrical surface (92a), which is located on a shaft (28) or axis of the sealing jaw carrier. 15. Verpackungsmaschine nach Anspruch 14, dadurch gekenn­zeichnet, daß dem Stößel eine Rückdrückfeder (98) zugeord­net ist, deren Spannung vorzugsweise einstellbar ist.15. Packaging machine according to claim 14, characterized in that the plunger is assigned a return spring (98), the tension of which is preferably adjustable. 16. Verpackungsmaschine nach einem der vorhergehenden An­sprüche, dadurch gekennzeichnet, daß an mindestens einer, vorzugsweise an beiden Quersiegelbacken von zusammenwir­kenden Paaren (81/82 bzw. 81a/82a) Luftdüsen (73) für Kühl­luft zur Abkühlung der Quersiegelnaht (96a, 97b) vorgese­hen sind.16. Packaging machine according to one of the preceding claims, characterized in that on at least one, preferably on both transverse sealing jaws of interacting pairs (81/82 or 81a / 82a) air nozzles (73) for cooling air for cooling the transverse sealing seam (96a, 97b) are provided are. 17. Verpackungsmaschine nach Anspruch 16, dadurch gekenn­zeichnet, daß die Welle (28, 94) mindestens eines Siegel­backenträgers (26, 27) einen Kühlluftkanal (56) enthält, der über eine flexible Leitung (63) mit einem Ringkanal (59) kommuniziert, der sich in einem Gleitstück (34) befindet und daß der Ringkanal (59) über mindestens eine Querbohrung (65) mit dem Hohlraum eines Siegelbackenhalters (36) kom­ muniziert, welcher Hohlraum (66) seinerseits über eine Lei­tung (68) mit einem Hohlraum (70) verbunden ist, von dem die Luftdüsen (73) ausgehen.17. Packaging machine according to claim 16, characterized in that the shaft (28, 94) at least one sealing jaw carrier (26, 27) contains a cooling air channel (56) which communicates via a flexible line (63) with an annular channel (59) which is in a slide (34) and that the annular channel (59) via at least one transverse bore (65) with the cavity of a sealing jaw holder (36) com which cavity (66) is in turn connected via a line (68) to a cavity (70) from which the air nozzles (73) originate. 18. Verpackungsmaschine nach einem der Ansprüche 16 und 17, dadurch gekennzeichnet, daß sich an belüfteten Quersiegel­backen (81, 81a, 82, 82a) ein Luftverteiler befindet, der einen großvolumigen Luftsammelraum (70) enthält, von dem Querbohrungen (76, 77) ausgehen, die zu einem Verteilerka­nal (72) führen, von dem die Luftdüsen (73) ausgehen, wo­bei die Querbohrungen (76, 77) bis zur Außenseite (78) des Luftverteilers (69) reichen und in denen Verschlußstopfen (79, 80) verschraubbar sind, mit denen der Strömungsquer­schnitt zwischen dem Luftsammelraum (70) und den Querboh­rungen (76, 77) einstellbar ist.18. Packaging machine according to one of claims 16 and 17, characterized in that there is an air distributor on ventilated cross sealing jaws (81, 81a, 82, 82a) which contains a large-volume air collecting space (70) from which transverse bores (76, 77) originate Which lead to a distribution channel (72) from which the air nozzles (73) extend, the transverse bores (76, 77) extending to the outside (78) of the air distributor (69) and in which sealing plugs (79, 80) can be screwed , with which the flow cross section between the air collecting space (70) and the transverse bores (76, 77) can be adjusted. 19. Verpackungsmaschine nach einem der vorhergehenden An­sprüche, dadurch gekennzeichnet, daß das Verhältnis zwi­schen der Abzugsgeschwindigkeit des Hüllstoffschlauches (4) und der Winkelgeschwindigkeit der Siegelbackenträger (26, 27) während eines Umlaufes der Siegelbackenträger (26, 27) veränderlich ist zur Herstellung einer gleichschnellen Bewegung von Hüllstoffschlauch (4) und Quersiegelbacken (81, 82, 81a, 82a) im Bereich der Siegelzone (D-C).19. Packaging machine according to one of the preceding claims, characterized in that the ratio between the withdrawal speed of the enveloping tube (4) and the angular speed of the sealing jaw carrier (26, 27) during one revolution of the sealing jaw carrier (26, 27) is variable to produce an equally fast movement of enveloping hose (4) and cross sealing jaws (81, 82, 81a, 82a) in the area of the sealing zone (DC). 20. Verpackungsmaschine nach Anspruch 19, dadurch gekenn­zeichnet, daß die Abzugsgeschwindigkeit des Hüllstoff­schlauches (4) konstant und die Winkelgeschwindigkeit der Siegelbackenträger (26, 27) veränderlich ist.20. Packaging machine according to claim 19, characterized in that the withdrawal speed of the enveloping tube (4) is constant and the angular velocity of the sealing jaw carrier (26, 27) is variable. 21. Verpackungsmaschine nach Anspruch 20, dadurch gekenn­zeichnet, daß die Winkelgeschwindigkeit der Schlauchbeutel­träger (26, 27) etwa bis zur Mitte der Siegelzone (D-C) zu­nimmt und danach wieder abnimmt.21. Packaging machine according to claim 20, characterized in that the angular velocity of the tubular bag carrier (26, 27) increases approximately up to the center of the sealing zone (D-C) and then decreases again. 22. Verfahren zum Betrieb einer Verpackungsmaschine nach22. Procedure for operating a packaging machine according to
EP86105780A 1985-12-20 1986-04-25 Packaging machine for forming, filling and sealing of bags Expired EP0226693B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR8606331A BR8606331A (en) 1985-12-20 1986-12-19 PACKING MACHINE TO MAKE BAGS, AND PROCESS FOR THE OPERATION OF SUCH A MACHINE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3545228 1985-12-20
DE19853545228 DE3545228A1 (en) 1985-12-20 1985-12-20 PACKING MACHINE FOR THE PRODUCTION, FILLING AND SEALING OF BAGS

Publications (2)

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EP0226693A1 true EP0226693A1 (en) 1987-07-01
EP0226693B1 EP0226693B1 (en) 1989-06-28

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US (1) US4750313A (en)
EP (1) EP0226693B1 (en)
JP (1) JPS62235006A (en)
DE (2) DE3545228A1 (en)

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Also Published As

Publication number Publication date
EP0226693B1 (en) 1989-06-28
JPS62235006A (en) 1987-10-15
DE3664125C5 (en) 2008-04-10
DE3664125D1 (en) 1989-08-03
US4750313A (en) 1988-06-14
DE3545228A1 (en) 1987-07-02

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